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694 calculators 15 categories 100% free & private

Finance

Salary, severance, loans, taxes, compound interest.

401(k) Contribution & Match Calculator Calculate your 2026 401(k) employee contribution, employer match, and projected year-end balance. IRS limit: $23,500 (under 50) or $31,000 (50+).

50/30/20 Family Budget Rule Master the 50/30/20 budget rule. Calculate needs, wants & savings for your household—free tool.

Argentina Aguinaldo (SAC) Calculator Calculate your Argentine aguinaldo (13th-month bonus): gross SAC based on best salary of the semester, 17% deductions, and proportional months worked.

Airbnb Short-Term Rental Net Profit Calculator 💰 Calculate net profit from Airbnb rentals: deduct commissions, expenses, taxes. Free calculator for 2026.

Crypto Airdrop Earnings Calculator: What Did You Really Make Per Hour? Calculate your true hourly return from crypto airdrops. Compare your result against Uniswap ($150/hr), Arbitrum ($67/hr), and Optimism ($160/hr) historical benchmarks. Was it worth it?

AL30 & GD30 Bond Yield Calculator Estimate the annual yield (IRR/YTM) of Argentine bonds AL30 and GD30 from your purchase price, coupon, and years to maturity. Includes yield table and risk context.

Investment Loan Monthly Payment Calculator Calculate the fixed monthly payment for an investment loan or broker financing. Enter loan amount, term (months), and annual rate to get your exact installment, total cost, and interest paid.

Annual Bonus Net Calculator Calculate your annual bonus after income tax withholding. Free calculator with 2026 tax rates. Get your exact net bonus instantly.

Annuity Monthly Payout Calculator Calculate your monthly annuity payout from a lump sum. Enter principal, annual rate, and payout years to estimate income, total received, and interest earned.

DeFi APY Calculator — Aave & Compound Stablecoin Yield Calculate your stablecoin lending yield on Aave V3 and Compound V3 with daily compounding. Enter amount, APY %, and days — see earnings and final value instantly.

Rent Increase Calculator: Quarterly, 4-Monthly & Semi-Annual Calculate how much your rent rises after 12 months with quarterly, 4-monthly, or semi-annual inflation adjustments. Enter your current rent + monthly rate and see the final amount instantly.

Auto Debt-Free Certificate Cost Calculate the cost of getting a free-and-clear auto title after paying off your loan in the US. Lien release fees, DMV title replacement costs by state, and processing times.

How BCRA Interest Rate Changes Affect Your Savings Calculate how Central Bank interest rate changes impact your savings. Free, fast, and accurate. See your results instantly.

Bitcoin Halving 2028: Price Projection Calculator Calculate Bitcoin price after 2028 halving. See potential returns based on historical multipliers. Free crypto projection tool.

Bitcoin Profit/Loss Calculator Calculate Bitcoin profit or loss instantly. Enter buy price, sell price, fees, and holding period to get net P&L, % return, annualized return, and short vs…

Bogleheads 3-Fund Portfolio Allocation Calculator Calculate your VTI + VXUS + BND portfolio allocation instantly. Free Bogleheads 3-fund strategy calculator.

Calculate AL30/AL35 Bond Yields & Returns Calculate IRR & current yields on Argentine sovereign bonds AL30/AL35. Free instant calculator with 2026 data.

Bond Modified Duration Calculator Calculate bond modified duration instantly. Enter YTM, years to maturity, and coupon frequency — get exact price sensitivity to a 1% rate move.

Zero-Coupon Bond Present Value Calculator Calculate the present value (price) of a zero-coupon bond instantly. Enter face value, YTM, and years to maturity — get today's fair price and discount. Includes reference table.

Calculate Cross-Chain Bridge Fees Calculate cross-chain bridge fees instantly. Find out how much it costs to move crypto between blockchains like Ethereum, Arbitrum, and more.

Bitcoin vs NASDAQ Correlation Calculator Calculate Bitcoin-NASDAQ correlation. Analyze BTC correlation with NASDAQ and S&P 500 for smarter portfolio diversification.

Calculate Your CAGR — Compound Annual Growth Rate Instantly calculate CAGR—the annualized return rate for any investment. Perfect for comparing stocks, crypto, and real estate. Example: $10K to $20K in 7 years.

Deregister Your Car for Scrapping Calculate deregistration costs for scrapped vehicles instantly and free. Stop paying registration fees. Estimate vehicle scrap & DNRPA fees.

Car Loan Monthly Payment Calculator Calculate your exact auto loan monthly payment with sales tax, trade-in, and down payment. Average APR 2026: 7.5% new / 11.5% used.

CEDEAR Dividend Yield Calculator (USD to ARS, 2026) Calculate the real peso dividend yield of any CEDEAR. Enter the CEDEAR price, conversion ratio, annual USD dividend, and exchange rate — get your exact ARS yield and annual income instantly. Includes formula, rate comparison table, and worked examples.

CEDEAR Ratio Converter: Apple vs. Microsoft Calculate CEDEAR conversion ratios between Apple and Microsoft stocks. Free tool updated 2026.

Calculate Your 15% Cedular Investment Income Tax (Argentina) Calculate Argentina's 15% cedular tax on investment income — stocks, bonds, CEDEARs, crypto, dividends. Instant result, updated for 2026. Based on Law 27,430.

Personal Loan CFT Calculator Calculate the true total finance cost (CFT/APR) of a personal loan including interest, VAT, and monthly fees. Compare offers from different banks in seconds.

Child Support Payment Calculator Calculate estimated child support payments based on salary and number of children. Free calculator using typical state guidelines for 2026.

Cold Wallet vs Hot Wallet See which crypto wallet allocation protects your assets best. Free calculator recommends cold vs hot wallet split based on your amount and usage.

Compound Interest Calculator Calculate compound interest with monthly contributions. See end balance, total interest earned, and a year-by-year breakdown using the A=P(1+r/n)^(nt) formula.

Condo Fee Calculator: Estimate Monthly Costs by Square Meter Calculate monthly condo fees by square meter and building category (basic, standard, premium). Get an instant estimate with a breakdown by amenities. Free tool.

Credit Card Minimum Payment Calculator See exactly how much you'll pay in interest and how many months it takes if you only pay the minimum. Enter your balance, APR, and minimum % — get the full cost breakdown instantly.

Credit Card Payoff Calculator Calculate months to pay off your credit card balance. Enter balance, APR, and monthly payment to see total interest and payoff timeline.

Criminal Background Check Cost & Processing Times (United States) Compare US criminal background check costs in 2026: FBI Identity History Summary ($18 + Channeler fee), state police checks ($5–$61), and FCRA-compliant employment screening ($25–$100).

Crypto Portfolio Value Calculator: BTC, ETH & USDT to USD Calculate the total value of your Bitcoin, Ethereum and USDT holdings in USD instantly. Enter your balances and current prices — get your total portfolio value in seconds.

Currency Converter: Enter Your Rate, Get the Exact Amount Convert any currency amount using the exact exchange rate you enter — from your bank, broker, or a live quote. Instant result + inverse rate. No stale data, ever.

Bitcoin DCA Historical Returns Calculate historical Bitcoin DCA returns with our free calculator. See how dollar-cost averaging would have performed from any date to 2026.

Debt Avalanche Payoff Calculator Use the debt avalanche method to find your optimal payoff order, total interest saved vs. snowball, and exact months to debt freedom. Enter up to 3 debts with their APR and minimum payment.

Debt Snowball Payoff Calculator See exactly when you'll be debt-free using the snowball method. Enter up to 5 debts, add an extra monthly payment, and get your step-by-step payoff order, interest saved, and months cut vs. minimums-only.

Debt Payoff Plan — Snowball Method Calculate how fast you can pay off multiple debts using the snowball method. See your payoff timeline. Free debt calculator.

Discount Calculator — Percent Off & Stacked Deals Enter any original price and one or two discount percentages. Get the exact final price, how much you save, and the real combined rate when two discounts stack (it's never the simple sum).

Estimate Your Divorce Settlement Costs Free divorce cost calculator for Argentina. Estimate attorney fees, liquidation costs, and timelines for marital property division.

Driver License Cost by Category Get costs for issuing or renewing driver's licenses by category and province. Free, fast calculator with 2026 rates.

Emergency Fund Calculator — 3 to 6 Months of Expenses Calculate your emergency fund target instantly. Enter your monthly expenses and how many months you want covered. See how a high-yield savings account grows your cushion.

Emergency Fund Calculator Calculate your ideal emergency fund target. Enter monthly expenses, job type, and dependents to get a personalized 3–12 month savings goal in dollars.

Employee vs Freelance: Annual Income Comparison Calculate your potential earnings as a freelancer vs employee. Compare annual net income with real 2026 rates.

Estimate Estate Settlement Costs & Attorney Fees Calculate total estate settlement costs including attorney fees, taxes & court fees. Free tool updated for 2026.

Ethereum Gas Fee Calculator — Gwei to USD Calculate Ethereum gas fees instantly in USD and ETH. Enter gas units, Gwei price, and ETH price to see the real cost of any transfer, swap, or smart contract call.

Ethereum Gas Fee Calculator Instantly estimate Ethereum gas fees in ETH and USD. Enter gas price (gwei) and ETH price to get the exact cost for transfers, ERC-20, Uniswap swaps, NFT mints, and DeFi — plus Layer 2 savings.

Eviction Timeline Calculator: How Long It Takes & What It Costs How long does eviction take by case type — non-payment, lease violation, holdover? Estimate the court timeline (21 days to 18+ months) and attorney fees ($500–$15,000+). Free calculator.

Federal Income Tax Calculator 2026 (USA) Calculate your 2026 US federal income tax using updated brackets (10–37%). Estimate tax owed, effective rate, marginal rate, and refund or balance due.

Argentina Construction Trust Installment Calculator Calculate your monthly installment and total amount owed in an Argentine fideicomiso (construction trust). Enter property value, total installments, and construction progress to get instant results.

FIRE Calculator: Your FI Number & Years to Financial Independence Calculate your FIRE number in seconds. Enter annual spending, portfolio & contributions → get FI number (spending × 25), years to retire early, and 4% rule check. Free, instant, no sign-up.

FIRE Number Calculator (Retire Early) Calculate your FIRE number using the 25× rule (4% SWR). Estimate years to financial independence, gap to target, and compare Lean, Standard, Fat & Coast FIRE.

First Home Purchase: Breaking Down Your Costs Calculate total first-time home buying costs: down payment, closing costs, moving & furniture. Free instant calculator.

Fixed Deposit Net Annual Returns Calculate fixed deposit net returns after taxes. Free instant calculator for your savings.

Food Handler Permit Cost in Argentina Calculate food handler permit and certificate costs in Argentina. Instant, free calculator with 2026 rates by municipality.

Foreign Residency & ID Cost Calculator Calculate Argentina foreigner residency & ID costs (temporary/permanent). Free estimator updated for 2026.

Freelance Hourly Rate Calculator by Experience & Specialty (USD) How much should I charge freelance per hour? Enter your years of experience and specialty — get a USD rate range, monthly equivalent, and a full rate table by seniority and field. Junior: $20–30/h. Senior: $70–105/h. Lead: $110–165/h.

Perpetual Funding Rate Calculator — Exact Cost for Any Position Calculate exactly how much you pay or receive in perpetual futures funding. Enter position size, rate, and hours held — get your funding cost instantly. Works for Bitcoin, Ethereum, and all crypto perps on Binance, Bybit, OKX.

Home Affordability Calculator Calculate the maximum home price you can afford based on income, debts, and down payment. Uses 28%/36% DTI rules and 2026 mortgage rates.

Argentina Severance Pay Calculator (Dismissal Without Cause) Calculate Argentine severance pay for unjust dismissal: Art. 245 seniority, notice period, month integration, proportional SAC, and unused vacation.

Compound Interest Calculator (long-term) Simulate how your investment grows with compound interest, monthly contributions, annual rate, and time horizon. Ideal for retirement planning and long-term…

Find Interest Rate Arbitrage Opportunities Compare HYSA, CD, T-Bill and MMF rates side-by-side. See how much you're losing in a 0.01% Chase or BofA account vs a 4.50%+ high-yield alternative.

IRA/401k Equivalent for Argentina Retirement planning for Argentina: Calculate IRA/401k equivalents, Roth alternatives, and tax-deferred savings strategies for 2026.

VAT / Sales Tax Calculator Add or remove VAT/sales tax from any price. Supports multiple tax rates (10.5%, 21%, 27%). See net price, tax amount, and total instantly.

VAT Refund on Debit Card Purchases Calculá el reembolso de IVA en compras con tarjeta de débito. Estimá tu devolución de impuestos y ahorrá hasta un 21% en segundos, gratis.

2-Year vs 3-Year Lease Comparison Compare 2-year vs 3-year rental leases in Argentina: typical guarantees, rent adjustment methods (ICL, USD, UVA), advantages and trade-offs. Free.

Lease vs. Buy: Compare Car Financing Options Compare leasing vs auto loans side by side. Calculate monthly payments and find the best car financing option for you.

Leverage Trading Liquidation Price Calculator Instantly find your liquidation price for any leveraged long or short position. Enter entry price and leverage — get the exact price that wipes your margin, plus a risk table for 2x to 100x.

Meeting Cost Calculator Find out exactly how much each meeting costs your company. Enter attendees, duration, and average monthly salary — get the real labor cost instantly.

Calculate Your Minimum Retirement Pension & Bonus Calculate Argentina's minimum retirement pension (ANSES) and complementary bonus 2026. Check your total benefits in ARS. Free online instantly.

Compare Your Salary to the 2026 Minimum Wage Calculate how your salary compares to the 2026 minimum wage. See how many times the minimum wage you earn and how much above minimum you are.

BCRA Monetary Policy Rate (TPM) Calculator 📊 Calculate returns using Argentina's BCRA monetary policy rate. Free TPM yield calculator for fixed deposits and peso savings.

Money Market Fund Yield Calculator Compare money market fund yields vs fixed deposits. Free, fast calculator for comparing returns.

Mortgage Payment Calculator (Monthly) Calculate your monthly mortgage payment. Estimate P&I, taxes, insurance, and PMI. Compare 15, 20, and 30-year fixed-rate loans instantly.

Mortgage Refinance Break-Even Calculator Find out exactly how many months until your refinance pays for itself. Enter your loan balance, current rate, new rate, and closing costs — get your break-even point, monthly savings, and total interest saved instantly.

Calculate Moving Costs: Truck + Distance + Packing Estimate moving truck costs with our free calculator. Factor in distance, volume, floor access & packing. Get accurate quotes instantly.

Net Worth Calculator Calculate your net worth instantly. Enter assets and liabilities to see your total wealth, asset breakdown, and how you compare to the US median by age group.

Calculate NFT Creator Royalties Calculate how much royalty an NFT creator earns from secondary market sales. Track earnings with our free calculator updated for 2026.

Overtime Pay Calculator Calculate overtime pay instantly. Enter your hourly rate and hours to see regular pay, time-and-a-half (1.5×), double time (2×), and total gross pay — with a reference table.

Passive Income From Investments Calculator Estimate monthly passive income from bonds, dividend stocks, REITs, HYSA & T-Bills. Compare yield-only vs 4% rule with 2026 tax impact.

Paycheck Take-Home Pay Calculator (USA) Calculate your net take-home pay after federal taxes, FICA, state tax, 401(k), and health insurance deductions. 2026 IRS brackets included.

Price-to-Earnings Ratio (P/E) Calculate P/E ratio, PEG ratio & fair stock value by sector. P/E = Price ÷ Earnings Per Share. Identify undervalued stocks. Free calculator.

Perpetual Futures P&L Calculator — Long & Short with Leverage Calculate your exact profit or loss on perpetual futures positions. Enter entry price, exit price, notional size, leverage and direction (long/short). Instant P&L + ROE.

Crypto Portfolio Allocation Calculator Enter your total portfolio and crypto percentage to instantly see your dollar split between traditional assets (stocks & bonds) and cryptocurrency. Clear donut chart included.

Stock Position Size Calculator: How Many Shares to Buy Calculate exactly how many shares to buy based on your capital, risk %, entry price, and stop-loss. Applies Elder's 2% rule. Instant result for any market.

Loan Payment Calculator Calculate monthly payment, total cost, interest, and APR for a personal or mortgage loan using the standard amortization formula. Rate, term, and principal…

Price-to-Book Ratio (P/B) Calculator Calculate P/B ratio for stocks vs. sector averages. Free calculator to find undervalued stocks by book value and identify value investing opportunities.

Property Deed Transfer Costs 2026 Calculate property deed & transfer costs in Argentina 2026: notary fees, taxes & stamp duty. Fast & free calculator for CABA/PBA.

New Car Registration Fee (DNRPA) in Argentina 2026 Calculate new car registration fees in Argentina: DNRPA 5% federal arancel plus 0.5%-3.6% provincial stamp duty. Free 2026 calculator for buyers.

Rule of 72: How Long to Double Your Money Use the Rule of 72 to find how long it takes to double your money. Enter any annual rate and get exact years, tripling & quadrupling times.

Rent-to-Own Calculator — How Much Rent Counts Toward Your Purchase Calculate how much of your monthly rent credits toward the property purchase price. Enter rent, months, property value, and credit percentage — see total credits and remaining balance instantly.

Rent vs. Buy Calculator (5-Year Horizon) Calculate the 5-year net cost of renting vs. buying a home. Compare total ownership costs against rent plus opportunity cost to find your break-even year.

Converting USD Rental Contracts to Pesos Calculate USD rental contract in pesos, understand pesification clauses, exchange rates & risks. Free tool for renters and landlords in Argentina.

Rental Deposit Calculator: How Many Months? (Argentina) Calculate your rental security deposit in Argentina under DNU 70/2023: max 1 month for new contracts, up to 3 months for older ones. Returned within 30 days of move-out.

Rental Guarantee Insurance Cost Calculate rental guarantee insurance costs as a deposit alternative. Free calculator, 2026 rates included.

Risk-Reward Ratio Calculator (R:R) Calculate your risk-reward ratio in seconds: enter your entry, stop-loss and take-profit to get the exact R:R, minimum win rate to break even, and total P&L. Professional minimum: 1:2.

ROI Calculator — Total Return & Annualized Rate (CAGR) Calculate ROI instantly: enter your initial investment and final value to get total return on investment %, net profit, and annualized ROI (CAGR). Free, no sign-up.

Roth vs Traditional IRA Calculator Calculate and compare Roth vs Traditional IRA after-tax balances. Uses 2026 IRS limits ($7,500 / $8,500), your marginal tax rates, and expected return to show which account leaves you wealthier.

Rule of 72 Calculator — How Many Years to Double Your Money Rule of 72 calculator: enter any annual interest rate and instantly find how many years to double your money. Includes exact log formula, tripling & quadrupling times, and a reference table.

Bank Safe Deposit Box Costs by Size & Type Compare annual safe deposit box costs by size and bank. Calculate monthly and yearly fees for securing valuables.

Sales Tax Calculator Free sales tax calculator. Add sales tax to a price or back the tax out of a tax-inclusive total. Enter amount and rate to get tax, subtotal, and total instantly.

Savings Goal Calculator Calculate the monthly savings amount needed to reach any financial goal. Enter your target, current balance, time horizon, and APY to get your required monthly…

Sharpe Ratio Calculator for Trading Strategies Calculate the Sharpe ratio of your trading strategy instantly. Enter annual return, volatility, and risk-free rate — get risk-adjusted performance with interpretation and benchmarks.

Simple vs Compound Interest Calculator Compare simple interest (I = P·r·t) vs compound interest (A = P(1+r/n)^nt) side by side. See the exact dollar difference, a year-by-year growth table, and Rule of 72 tips.

Calculate Your ETH Staking Rewards Calculate ETH staking rewards and annual yield. Estimate your Ethereum APY with real-time prices and maximize staking earnings.

Staking Rewards Calculator Calculate crypto staking rewards for ETH, SOL, ADA, ATOM, DOT or custom APR. Estimate token earnings and USD value over any period with compound frequency and…

Stock Options Vesting Calculator — 4-Year Schedule with Cliff Calculate exactly how much of your tech startup equity vests over 4 years. Enter your grant, time at company, and growth rate to see vested value at every milestone.

Student Loan Payoff Calculator Calculate how extra monthly payments cut your student loan payoff time. Compare months to payoff, total interest paid, and your exact payoff date.

Argentina Salary Calculator (Gross to Net) Calculate your net salary in Argentina from gross pay: social security deductions (17%), healthcare, and income tax based on 2026 ARCA/AFIP brackets.

IRR and NPV Calculator for Investment Projects Calculate IRR (Internal Rate of Return) and NPV (Net Present Value) for any investment. Enter initial outlay, annual cash flow, and discount rate — get an instant verdict on whether the project beats your opportunity cost.

Calculate Your Total Employment Cost Find the true cost of hiring: salary + payroll taxes, workers comp, and benefits. See real employment costs in 2026.

Transfer Your Car Registration to Another Province Estimate the total cost of transferring your car registration between Argentine provinces: stamp tax, DNRPA fee and notarial costs. Free, fast, 2026.

US Tourist Visa Cost Calculator: B1/B2 Fees US B1/B2 tourist visa cost calculator. Get your total cost breakdown: MRV fees ($185), photos, translations & processing. Free tool, instant results.

USD Broker Investment Yield Calculator Calculate USD brokerage returns across Schwab, Fidelity, Vanguard, IBKR, Robinhood and M1. Compare expense ratios, account types and tax drag. Free, 2026 updated.

Compare USDT vs USDC: Fees, Risks & Which Is Better Calculate USDT vs USDC costs, fees & exchange risks. Compare stablecoin options on Binance, Coinbase & Kraken for 2026.

Used Car Transfer Cost 💰 Find the cost to transfer a used car: registration fees + taxes + state stamps. Free & instant calculator.

Calculate Your Vacation Days by Seniority Free calculator for paid vacation days earned by tenure under Argentina's LCT labor law. Accurate 2026 rates.

VAT Calculator Free VAT calculator. Add VAT to a net price or remove VAT from a gross (VAT-inclusive) price. Enter the amount and rate to get net, VAT, and gross instantly.

Net Present Value (NPV) NPV calculator: compute the NPV of a project with discounted future cash flows. Acceptance criterion, formula, profitability index, and examples.

Calculate Your Weighted Average Cost for Crypto Purchases Calculate weighted average cost across multiple crypto purchases. Track 5 transactions, find your break-even price instantly. Free—see your profit zone.

Impermanent Loss Calculator — DeFi Liquidity Pool Calculate impermanent loss (IL) instantly for any token price change. Enter the % move and see exactly how much you lose vs HODLing — plus an IL reference table from ±25% to ±900%.

Health

BMI, calories, body fat, pregnancy, fitness.

A1c to Average Glucose (eAG): Calculator + Conversion Chart Convert your A1c percentage to estimated average glucose in mg/dL. ADA-endorsed Nathan formula (eAG = 28.7 × A1c − 46.7) plus a full A1c-to-mg/dL chart, GMI and CGM Time-in-Range context.

Waist Circumference Cardiovascular Risk Calculator Enter your waist measurement and instantly see your cardiovascular risk level per WHO and IDF thresholds. Men: increased risk ≥94 cm; women: ≥80 cm. No sign-up needed.

How much added sugar per day? WHO limit calculator Calculate grams of added sugar in any serving using its weight and label percentage. WHO limits: max 50 g/day (10% of calories), ideal target 25 g/day (5% — about 6 teaspoons).

How Much Sleep Do Adults Need by Age? AASM/NSF guidelines: adults 18–64 need 7–9 hours; adults 65+ need 7–8 hours. Enter your age (and current sleep) to get your recommended range and a personalised interpretation.

Calories in Beer, Wine & Spirits Calculator How many calories in a beer, glass of wine, or shot of spirits? A 12 oz beer at 5% = ~145 kcal; a 5 oz wine = ~125 kcal; a 1.5 oz spirit shot = ~105 kcal. Instant result using the standard ethanol formula.

Is your AMH normal for your age? Interpret your result Enter your AMH level (ng/mL) and age. The calculator compares your result against age-adjusted reference ranges (Seifer et al. 2011 / ASRM) and tells you if your ovarian reserve is low, normal, or high — with a reference table, worked example, and next-step guidance.

Baby Name Meaning Finder — Origin, Popularity & Variants Type any baby name and instantly see its meaning, origin, and popularity. Includes a table of the top 20 most popular names with meanings for 2025–2026.

Baby Shoe Size by Age & Foot Length Find your baby's shoe size from age or foot length in cm. Instant chart with US, EU, UK and AR conversions for 0-24 months, plus how to measure correctly.

How Much Sleep Does Your Baby Need by Age? AAP/AASM recommended sleep hours by age (newborn 14-17h to teen 8-10h), wake windows, nap schedules, and safe sleep guidance per US pediatric standards.

Baby Teeth Eruption Timeline: When Do They Come In? Enter your baby's age in months and instantly see which of the 20 primary teeth should have erupted, how many to expect, and which are coming next. Full eruption chart from 6 to 33 months.

Basal Body Temperature & Ovulation Detection Track your daily basal body temperature to detect the biphasic pattern that indicates ovulation. Natural fertility awareness tracking method.

Blood Alcohol Content (BAC) Calculator — Widmark Formula Calculate your blood alcohol content (BAC) by drink type, body weight, and hours elapsed. Uses the Widmark formula. See how long alcohol stays in your system. Free.

Normal Blood Oxygen (SpO2) at Altitude — Calculator & Reference Chart Enter your pulse oximeter reading and altitude to instantly know if your SpO2 is normal for that elevation. Altitude-adjusted thresholds: ≥95% at sea level, ≥93% at 1,500 m, ≥90% at 2,500 m, ≥88% above 3,500 m. Based on published altitude-physiology research.

Blood Oxygen Saturation (SpO2) Interpreter Enter your pulse oximeter reading to instantly know if your SpO2 is normal (95–100%), borderline, or dangerously low. Altitude-adjusted. Based on WHO/ATS/ERS guidelines.

Blood Pressure Chart: Normal, Elevated & Hypertension Ranges Is your blood pressure normal? Enter systolic/diastolic to classify it instantly: Normal, Elevated, Stage 1 or Stage 2 Hypertension, or Crisis. Full AHA/ACC chart + ranges by age.

Blood Pressure WHO Classification Calculator Classify your blood pressure reading using the 2017 AHA/ACC guideline (US standard) and the WHO/ISH 2023 reference. Normal, Elevated, Stage 1, Stage 2, and Hypertensive Crisis cut-offs in mmHg.

BMI Calculator for Seniors Age 65+ Free BMI calculator for adults 65+. Uses evidence-based geriatric ranges (ESPEN 22–27 healthy), not just standard WHO. Sarcopenia, obesity paradox explained.

BMR Calculator (Harris-Benedict): Calories Burned at Rest BMR calculator using the Harris-Benedict revised formula. Find your basal metabolic rate and daily calories burned at rest from weight, height, age and sex, plus a TDEE table for every activity level.

BMR Calculator — Mifflin-St Jeor Equation Calculate your Basal Metabolic Rate instantly with the Mifflin-St Jeor formula. Get your BMR + TDEE by activity level. Includes reference table for men and women by age and weight.

Basal Metabolic Rate (BMR) and TDEE Calculator BMR calculator: calculate your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) using Mifflin-St Jeor. Calories to lose, maintain, or gain.

Body Composition Calculator: Fat Mass vs Lean Mass Calculate your fat mass and lean mass in kg from your body weight and body fat percentage. Bicompartmental formula + ACSM reference ranges by sex. Instant result.

Jackson-Pollock Body Fat Calculator (3-Site Skinfold Method) Calculate body fat percentage with the Jackson-Pollock 3-site skinfold method. Enter your caliper readings to get body density, fat mass, lean mass, and ACE classification instantly.

How Much Breast Milk or Formula Does Your Baby Need? 🩺 Baby formula calculator: Find how many ml your baby needs per feeding by age and weight. Based on WHO & AAP guidelines. Quick and free.

How Much Breast Milk Should I Pump? Output Calculator + Chart How much breast milk should you pump? Enter your baby's age, ml per session and sessions/day to see your 24-hour output vs. the normal range — plus a full pumping output chart by week.

Breastfeeding Calories Calculator — Extra kcal/day by Nursing Type How many extra calories do you need while breastfeeding? Exclusive nursing adds ~500 kcal/day. Enter your weight and activity level to get your personalized total in seconds.

Burnout Index Calculator Assess your burnout risk with the simplified Maslach Burnout Inventory (MBI). Get your free burnout score today.

How Much Caffeine Per Day Is Safe for My Weight? Calculate your safe daily caffeine limit by body weight using the FDA's 6 mg/kg guideline (capped at 400 mg). Instant result in mg + coffee cup equivalent. Pregnancy adjustment included.

How Much Calcium Do You Need Per Day? By Age, Sex & Life Stage How much calcium per day? Adults 19–50 need 1000 mg; women over 50 and adults 71+ need 1200 mg; teens 9–18 need 1300 mg. Full IOM/NIH chart + free calculator.

Walking Calories Calculator Walking calories: how many calories do you burn walking? Calculation based on METs adjusted for speed, weight, and slope. With food equivalents.

TDEE Calorie Calculator (Total Daily Energy Expenditure) Calculate your daily calorie expenditure (TDEE) using Mifflin-St Jeor: calories to maintain, lose, or gain weight based on age, sex, activity, and weight.

Calories Burned Doing Household Chores (Calculator + Table) Calculate exactly how many calories you burn cleaning, vacuuming, gardening, or cooking by weight and duration. Uses MET values from Ainsworth's Compendium of Physical Activities — the CDC gold standard.

Gluten in Foods: ppm Levels & Celiac-Safe Alternatives Check gluten content (ppm) for common foods and find safe celiac alternatives. Wheat flour: ~30,000 ppm. Barley: ~25,000 ppm. Oats: 100–300 ppm. Legal gluten-free limit: 10 ppm (Argentina) / 20 ppm (FDA/Codex).

Child BMI Percentile Calculator (CDC, Ages 2-19) Find your child's BMI percentile by age and sex using CDC growth charts. Free pediatric BMI calculator with the CDC weight-status table and 2023 AAP obesity guidelines.

How Tall Will My Child Be? Adult Height Predictor Predict your child's adult height from the parents' heights with the Tanner mid-parental formula. Free calculator + height chart by parents and a ±8.5 cm range.

Heimlich Maneuver by Age Group Correct Heimlich technique by age: adult, child, infant, pregnant. AHA-based step-by-step guide. What to do if someone is choking — free, no registration.

Total Cholesterol, LDL & HDL Calculator Cholesterol calculator using ACC/AHA 2018 guidelines: classify Total (<200), LDL (<100 optimal), HDL (>40 men / >50 women), Triglycerides, and Non-HDL. Instant, no sign-up.

Does Coffee Dehydrate You? The Real Numbers on Caffeine and Hydration Coffee does NOT dehydrate you — it hydrates at ~90% of its volume. Calculate your net daily hydration from coffee and your total caffeine intake. See exactly how many mL you get and whether you're within the 400 mg/day safe limit.

CPR Compression Rate and Depth Calculator (AHA 2020 BLS Guidelines) Correct CPR compression rates, depths, and compression-to-ventilation ratios for adults, children, and infants per 2020 AHA guidelines. Instant BLS reference.

How Much Creatine to Take by Body Weight How much creatine should you take? Get your exact loading and maintenance dose by body weight (ISSN formula) plus a full g/day table for 50–110 kg. Free, instant.

Creatine Loading and Maintenance Protocol Calculate your creatine dosage for loading and maintenance phases based on body weight. Validated protocol dosing guide.

Daily Caffeine Limit Calculator: How Many Cups Today? Add up coffee, espresso, tea, and energy drinks and compare against the 400 mg/day FDA/EFSA safe limit. Includes caffeine-per-drink table. Free, instant, no signup.

How Much Calcium Do You Need Per Day? Calculator by Age Calculate your daily calcium requirement by age, sex, and pregnancy status. NIH/IOM RDA: 1,000–1,300 mg/day. Includes food sources table and personalized recommendation.

Daily Dietary Fiber Intake Calculator by Age & Sex Find out how much fiber you need per day based on age and sex. NASEM Adequate Intake: men 19–50 = 38 g/day, women 19–50 = 25 g/day, pregnancy = 28 g/day. Full DRI table included.

How much iron do I need per day? RDA by sex and life stage Adult man: 8 mg/day · Women 19–50: 18 mg/day · Pregnancy: 27 mg/day (IOM/NIH). Enter your daily dietary iron to see if you meet your RDA. Free iron intake calculator.

How Much Protein Per Day? Daily Protein Intake Calculator How much protein do you need per day? Enter your weight and goal to get your grams/day. Active adults: 0.5–0.7 g/lb; muscle gain: 0.7–1.0 g/lb; cutting: ~0.8–1.1 g/lb. Free table included.

How Much Sodium Per Day? Daily Limits by Health Condition How much sodium per day? 2,300 mg for healthy adults, 1,500 mg with hypertension, kidney disease or diabetes. Full table by profile + salt conversion (WHO & AHA).

How Many Steps Per Day Do You Need? (By Age) Find out how many steps per day are recommended for your age. Based on Paluch 2022 Lancet meta-analysis and WHO 2020 guidelines. Includes step target table by age group, activity level, and gap to your goal.

How Much Water Should You Drink Per Day? (By Body Weight) How much water should you drink a day? Enter your weight to get your target in liters, fl oz, and cups. Uses the 35 ml/kg baseline (NAM) plus add-ons for exercise, hot climate, pregnancy, and breastfeeding — with a quick-reference chart.

How Much Water Should I Drink a Day? Intake Calculator How much water should you drink daily? Get your personalized target by body weight, activity, and climate — plus a ml/kg chart and the NAM guidelines. Free.

Calculate Your Daily Water Intake Personalized daily water intake calculator: IOM/EFSA 35 ml/kg baseline + ACSM exercise adjustment + climate factor. Get your result in liters and fl oz instantly.

DASH Diet Daily Sodium Limit Calculator How much sodium per day on the DASH diet? Standard: 2,300 mg/day. Strict: 1,500 mg/day. Calculate your limit and convert it to grams of salt instantly.

Mediterranean Diet Adherence Test (PREDIMED MEDAS) Score your Mediterranean diet adherence with this fast PREDIMED MEDAS-based test. Answer 4 key habits, get a 0–4 score, and see the full 14-item MEDAS cutoffs.

Electrolyte Replacement Calculator for Athletes Calculate how much sodium, potassium, and fluid you need per hour of exercise based on body weight, duration, temperature, and intensity. Based on ACSM guidelines. Free, instant results.

Embryo Implantation Calculator: When Does It Happen? Find your embryo implantation window by DPO or IVF transfer date. See the most likely implantation day, when to test, and early symptoms — based on Wilcox 1999.

Epinephrine Dosage for Anaphylaxis Calculate epinephrine IM dose by patient weight for anaphylaxis emergency treatment.

Estrogen & Progesterone Levels by Menstrual Cycle Phase Enter your cycle day and instantly see expected estrogen (E2) and progesterone (P4) levels by phase — menstrual, follicular, ovulatory, luteal. Reference ranges from NIH and Endocrine Society. Free, no sign-up.

What Are Normal Fasting Blood Glucose Levels? Normal fasting glucose <100 mg/dL. Prediabetes 100-125. Diabetes ≥126. Enter your reading in mg/dL or mmol/L — instant ADA 2026 classification.

Flexitarian Diet Macro Calculator — Daily Protein, Fat & Carbs Calculate your exact macros for the flexitarian diet: 20% protein, 30% fat, 50% carbs. 5 plant-based days + 2 meat/fish days. Instant results, free.

Low FODMAP Foods: Complete Chart for IBS Look up any food to see its FODMAP level, safe serving size, and low-FODMAP alternatives — based on the Monash University database. The fastest FODMAP reference for IBS management.

How Long Does Food Take to Digest? (Gastric Emptying Calculator) Find out how long food stays in your stomach by food type and portion. Full digestion time chart: water (20 min) to fatty meats (6 h). Based on clinical gastric emptying data from NIH/StatPearls. Free, no sign-up.

Food pH and Alkalinity Calculator Check pH levels of 15 common foods. Acidic <7, neutral =7, alkaline >7. Foods with pH<4 erode tooth enamel. Nutritional reference table.

Food Satiety Index Calculator Free satiety index calculator 2026 for 24+ foods (Holt 1995). White bread = 100. Pick high SI foods to feel full longer per calorie. Calculate now.

What FSH Level Indicates Menopause vs. Perimenopause? What FSH level means menopause? Enter your FSH, LH and age to see your stage — reproductive, perimenopause or menopause — with the full IU/L reference chart by stage.

Gestational Age Calculator (GA, Weeks + Days) 🩺 Clinical gestational age calculator. Enter LMP or CRL from a first-trimester ultrasound and get exact GA in weeks+days, trimester, and ACOG-compliant EDD.

eGFR Calculator — CKD-EPI 2021 Kidney Function Estimator Calculate your estimated GFR (eGFR) using the CKD-EPI 2021 equation (no race variable). Enter serum creatinine, age, and biological sex to get your kidney function stage (G1–G5 KDIGO) and a clinical recommendation.

Glycemic Load Calculator (GI × carbs ÷ 100) Calculate the glycemic load of any food: GL = (GI × available carbs per serving) ÷ 100. Free calculator + table of common foods (rice, watermelon, oats, lentils) with low / medium / high ratings per Harvard and University of Sydney.

Glycemic Load Calculator (GL of any food or meal) Glycemic load = GI × carbs ÷ 100. Calculate the real blood sugar impact per serving. GL under 10 is low, 11–19 medium, 20+ high. Free calculator + food table.

Body Fat Percentage Calculator (US Navy Method) Calculate your body fat percentage using the US Navy method with just a tape measure. No scale, no equipment. Classified by ACE standards.

Caloric Deficit Calculator for Healthy Weight Loss Calculate exactly how many calories to cut per day to lose weight safely. Enter current weight, goal weight and weeks — get your daily deficit and whether your pace is healthy or aggressive.

Healthy 150-300 Calorie Snacks Calculate exactly how many calories each snack should have based on your TDEE, meal split, and number of daily snacks. Science-backed, free, no sign-up.

HbA1c Calculator: Convert A1c to Estimated Average Glucose (eAG) Enter your HbA1c and instantly get your estimated average glucose (eAG) in mg/dL and mmol/L. Automatic classification: Normal, Prediabetes, or Diabetes per ADA 2026. Based on the Nathan ADAG formula validated in 507 patients.

How Much Water Should I Drink Per Day in Hot Weather? Calculate exactly how much water you need per day based on your weight, temperature, and exercise minutes. Uses the medical 35 mL/kg formula with heat and activity adjustments. Instant results in liters and glasses.

Ideal Weight for Women by Height (Devine, Robinson & Hamwi) Find your ideal weight for women by height using three evidence-based formulas (Devine, Robinson, Hamwi). Includes a reference chart from 5'0" to 6'0" and frame size adjustments.

Ideal Weight Calculator — Lorentz & Devine Formulas Find your ideal body weight by height with the Lorentz (1929) and Devine (1974) clinical formulas. Enter height and sex — get both numbers, a height-by-height table, and your healthy BMI range.

BMI Calculator (Body Mass Index) Calculate your BMI with weight and height: WHO category, healthy weight range, and how far you are from it. Instant results, no sign-up required.

How many calories to eat on 16/8 intermittent fasting? Find your daily calorie target and how to split it across your 8-hour eating window — using the Mifflin-St. Jeor equation (AND gold standard). Free, instant, no sign-up.

Intermittent Fasting Window Calculator Calculate your fasting and eating windows for 16:8, 18:6, 20:4, or OMAD protocols. Get exact start/end times and estimate when autophagy and ketosis begin.

Ferritin & Hemoglobin Checker: Normal, Low or Iron-Deficiency Anemia? Enter your ferritin and hemoglobin to see if your iron stores are normal, low or deficient — and whether you meet the WHO anemia threshold. Ferritin under 30 ng/mL means low iron. Includes a full reference chart.

Calculate Your Fertile Window with Irregular Periods 🩺 Irregular period fertility calculator: enter your shortest and longest cycles to estimate your fertile window. Adapted Ogino method.

Lean Body Mass (LBM) Calculator Calculate your lean body mass (LBM) in kg and lb using the Boer formula. Get fat mass, body fat %, and lean mass % instantly — used for protein targets and drug dosing.

16:8 Intermittent Fasting Macro Calculator Calculate your 16:8 intermittent fasting macros in seconds: 30% protein, 30% fat, 40% carbs split across 2 meals. Free macro table for 1500–2500 kcal.

Atkins Diet Macros by Phase Atkins macros for all 4 phases: Induction <20g net carbs, Balancing 25–50g, Pre-Maintenance 50–80g, Lifetime 80–100g. Enter your calories and phase to get protein, fat and net carbs in grams.

Carnivore Diet Macros Calculator Calculate carnivore diet macros: 30% protein / 70% fat / 0% carbs. Reference table from 1,500 to 4,000 kcal. Strict carnivore, nose-to-tail, and lion diet explained.

Macro Calculator for Cutting and Bulking Free macro calculator for cutting, bulking, or maintenance. Get your exact daily protein, carb, and fat grams from your TDEE or bodyweight — with a quick-reference macro chart.

DASH Diet Macro Calculator for Blood Pressure 🩺 DASH diet for hypertension: 18% protein, 27% fat, 55% carbs, <2300mg sodium & 4700mg potassium. -11 mmHg in 2 weeks · Free & fast.

IIFYM Calculator — If It Fits Your Macros (Flexible Diet) Calculate your IIFYM macros instantly: 30% protein, 30% fat, 40% carbs on your daily calorie target. Includes 80/20 flexible allowance and a reference table for common calorie goals.

Low-FODMAP Macro Calculator for IBS & SIBO Calculate your low-FODMAP macros in seconds: 20% protein, 30% fat, 50% tolerated carbs (Monash protocol). Includes a food list and comparison table. Backed by 70% IBS symptom improvement evidence.

Mediterranean Diet Macro Calculator (15-35-50) Calculate your Mediterranean diet macros: 15% protein, 35% healthy fat (olive oil & fish), 50% whole-grain carbs. Reference table for 1500–3000 kcal. PREDIMED-proven.

Calculate Your Macros for Recomposition, Cutting, and Bulking Evidence-based macro calculator for body recomposition, cutting, and lean bulking. Built on ISSN protein guidelines and Helms/Aragon recomp framework. Updated May 2026.

Magnesium Dosage Calculator: Daily RDA by Age and Sex Find your recommended daily magnesium intake (RDA) by age and sex, based on NIH Office of Dietary Supplements guidelines. Includes full table by age group, best supplement form, and top food sources. Instant, no sign-up needed.

Daily Magnesium Requirement Calculator (RDA by Age & Sex) Find out exactly how much magnesium you need per day. RDA table by age and sex (310–420 mg), top food sources, and supplement guide: glycinate, citrate, malate.

Male Fertility by Age: How Age Affects Sperm Quality How does age affect male fertility? Enter your age to see sperm motility, DNA fragmentation, time to conception and genetic risks — with a full age-by-age table.

Calculate Your Maximum Heart Rate by Age ❤️ Calculate your maximum heart rate using the Tanaka formula (208 − 0.7×age). More accurate than 220−age. Training zones + Karvonen method included. Fast and free.

Mediterranean Diet Weekly Meal Plan Calculator Calculate your personalized Mediterranean diet weekly plan: calorie-adjusted servings by food group, macronutrient breakdown, and weekly portions based on the Mediterranean Diet Pyramid 2020.

How Much Melatonin Should You Take for Sleep? Calculate the right melatonin dosage for better sleep based on your age. Free calculator with safe recommendations.

Omega-3 DHA+EPA daily dose calculator: how much do you actually get? Calculate the real mg of DHA+EPA you get from your fish oil capsule. The AHA recommends 250–500 mg/day. Enter total oil, concentration % and capsules per day — instant result.

One Rep Max Calculator (1RM) — Epley, Brzycki & Lombardi Estimate your 1 rep max from reps and weight using the Epley, Brzycki and Lombardi formulas, plus a full % chart (50–95% of 1RM) for programming and meet openers.

Ovulation and Menstrual Cycle Calendar Calculator Calculate your ovulation day and 6-day fertile window in seconds. Enter your cycle length to predict your most fertile days and plan pregnancy naturally.

How Much Should a Child Weigh? Healthy Weight by Age & Sex How much should your child weigh? Enter age and sex to get the healthy weight range (15th–85th percentile) from official WHO growth standards, plus a full weight-by-age chart for boys and girls.

Ideal Weight Calculator by Height and Sex Ideal weight calculator: calculate your ideal weight using Devine, Robinson, and Lorentz formulas. WHO healthy BMI range. Men and women.

Postpartum Weight Loss Timeline Calculator How long does it take to lose baby weight? Enter your pre-pregnancy and current weight to get a realistic postpartum timeline. You lose ~5–6 kg at birth; the rest takes 6–12 months at 0.5 kg/week.

How Often Should You Do Pilates Reformer Per Week? Find out your ideal Pilates Reformer frequency per week based on your goal: toning (3-4x), posture (2-3x), maintenance (2x), injury recovery, or postpartum. Evidence-based recommendations + full table.

Postpartum Depression Test — EPDS Edinburgh Scale Take the validated Edinburgh Postnatal Depression Scale (EPDS) — 10 questions about the past 7 days. Instant score with interpretation: 0–9 low risk, 10–12 possible mild, 13+ probable PPD. Used worldwide by OBs and pediatricians.

PRAL Calculator: Calculate Urine Acidity by Food PRAL calculator: Measure food's renal acid load. Positive values acidify urine, negative alkalinize. Manage kidney stones, gout, osteoporosis.

Pregnancy Due Date Calculator (EDD) Calculate your estimated due date (EDD) in seconds using your last menstrual period (LMP). Get gestational week, trimester, and days remaining with Naegele's…

Pregnancy Week Calculator — How Many Weeks Am I? Calculate how many weeks pregnant you are using your last menstrual period (LMP). Get your gestational week, trimester, and key pregnancy milestones instantly.

Calculate Your Premature Baby's Corrected Age Calculate your premature baby's corrected age in seconds. Enter birth date and gestational weeks to find adjusted age for development & growth tracking. Free.

How Many CFU of Probiotics Do I Need Per Day? Find your daily probiotic CFU dose by age group and health goal. Reference table for adults, children and infants — with best-evidence strains. Based on WGO and NIH guidelines. Free, no sign-up.

Ring Size Calculator: Convert mm to US, UK & EU What's my ring size? Measure your finger circumference in mm and instantly convert to US, UK and EU ring sizes. Free calculator + full conversion chart and how-to-measure guide.

RPE & RIR Calculator — Reps in Reserve and % of 1RM Enter your reps and RPE (6–10) to instantly find your RIR and estimated 1RM percentage. Based on the Tuchscherer/RTS table used by powerlifters worldwide.

Daily Sodium Calculator by Blood Pressure (WHO & AHA limits) How much sodium per day? Hypertension: 1,500 mg (AHA). General: 2,000 mg (WHO). 1 g of salt = 400 mg sodium. Calculate your personal daily limit instantly.

Semen Analysis Normal Values — WHO 2021 Reference Check your semen analysis results against WHO 2021 (6th edition) reference limits: concentration ≥16 M/mL, progressive motility ≥30%, morphology ≥4%, volume ≥1.4 mL. Instant result with clinical diagnosis.

How Long Does Sunscreen Protect You? SPF Time Calculator How long does SPF 30 or 50 protect you? Multiply your skin's burn time by the SPF number. Get your exact protection window by Fitzpatrick skin type, plus a reapplication table.

Sports Hydration & Electrolyte Calculator Calculate your safe fluid deficit, hourly intake, and sodium needs for any workout. Enter weight, duration, and intensity — get a complete hydration plan based on ACSM guidelines. Free and instant.

Subcutaneous vs Visceral Fat: Understanding the Difference Calculate how much of your total body fat is visceral (organ-surrounding) versus subcutaneous (under-skin). Enter your total body fat % and visceral fat share to see the split and your metabolic risk level.

Body Surface Area (BSA) Calculator – Du Bois, Mosteller & Haycock Calculate your body surface area (BSA) in m² with the Du Bois, Mosteller and Haycock formulas. Free BSA calculator for chemotherapy dosing, cardiac index and GFR, with a reference table by weight and height.

What Supplements Should Beginners Take? Calculate Your Doses Calculate your daily protein and creatine dose based on your body weight, goal and diet. ISSN science-backed: 1.8–2.2 g/kg protein for muscle gain + 3 g/day creatine monohydrate.

Heart Rate Zone Calculator by Age — 5 Training Zones (Karvonen Method) Enter your age and resting HR to get your exact 5 heart rate training zones (bpm) using the Karvonen method. Includes Z2 fat-burn, Z4 threshold, and VO2-max zones with a reference table by age.

TDEE Calculator (Mifflin-St Jeor) How many calories do you burn per day? Calculate your TDEE with the Mifflin-St Jeor formula — get your maintenance, cutting and bulking calories, plus an activity-factor table.

Normal testosterone levels by age in men Check if your testosterone (ng/dL) is normal for your age. Reference table by age group (<30, 30–39, 40–49, 50–59, 60+) from Endocrine Society, AUA, and NHANES. Instant result.

Normal Triglyceride Levels: What Do Your Numbers Mean? Enter your triglyceride result (mg/dL or mmol/L) and instantly see if it's normal, borderline high, high, or very high per NCEP ATP III / AHA guidelines — with a full reference chart.

Vegan Diet Macros Calculator 🩺 Vegan diet macros: 20% protein, 25% fat, 55% carbs. Calculate grams needed daily. Free plant-based nutrition calculator.

Vegan Macro Calculator with Plant Protein Source Guide Calculate your daily macros for a vegan diet: protein, fat, and carbs based on your weight, height, age, activity level, and goal. Includes how many grams of each plant protein source you need daily. Free, no sign-up.

How much vitamin B12 do vegans need? Dosage by frequency The correct B12 dose for vegans: 25–100 mcg/day or 2,000 mcg/week of cyanocobalamin. Based on NIH and Vegan Society guidelines. Includes dosage table, absorption math and monitoring schedule.

Vitamin D Daily Dosage & Sun Exposure Calculator Calculate how many minutes of sun you need for vitamin D synthesis and the recommended IU supplement dose by age, skin type, latitude zone, and season.

Vegan B12 Dosage Calculator: Daily vs Weekly How much B12 should vegans take? 250 mcg/day (adult), 500 mcg/day (65+), or 2000 mcg/week. Evidence-based — NIH & Vegan Society. No reliable plant sources; supplementing is mandatory.

Cooper 12-Minute Run Test — VO2 Max Calculator Enter distance covered in 12 minutes (miles, km, or meters) to instantly estimate your VO2 max in ml/kg/min and see your fitness category (Very Poor to Superior) against Cooper Institute norms for your age and sex.

Waist-to-Hip Ratio Calculator Calculate your waist-to-hip ratio (WHR) using the WHO formula. Get instant low / moderate / high cardiovascular risk classification by sex. Free, no login required.

How Many Sets Per Week for Muscle Growth? Hypertrophy Volume Calculator Calculate the exact weekly set range for each muscle group to maximize hypertrophy. Based on Schoenfeld's evidence-based guidelines. Get minimum, optimal, and maximum tolerable sets in seconds.

Weight Loss Plateau Calculator — Get Your Break-Through Strategy Enter how many weeks you've been stuck and your current calorie deficit and get an evidence-based strategy: continue, diet break, or NEAT/sleep/protein review. With decision table and scientific sources.

When to Take a Pregnancy Test: Reliable Results Pregnancy test timing calculator: enter your last period to find the earliest reliable day for blood or urine testing. Avoid false negatives.

Calculate your daily whey protein scoops How many whey scoops a day? Enter your weight, goal, diet protein, and scoop size to get your exact daily number. Based on ISSN 2017 protein guidelines.

How Much Iodine Do You Really Need? Calculate your daily iodine RDA for pregnancy, breastfeeding, and general health US. Find iodine-rich foods and life stage targets. Calculate free.

Calories Burned in Yoga by Style: Vinyasa, Hatha, Ashtanga Find out exactly how many calories yoga burns by style (Vinyasa, Hatha, Ashtanga, Bikram, Yin). Free calculator with MET-based formula + comparison table for different body weights.

Daily Zinc Requirement: How Much Zinc Do You Need? Zinc RDA: 11 mg/day for men, 8 mg/day for women — more if pregnant or vegetarian. Enter your profile for your exact daily target plus the best food sources and supplement guide.

How Much Zinc Per Day? Dosage by Sex and Health Goal How much zinc per day? Men 11 mg, women 8 mg (NIH RDA); 15 mg for immunity, up to 50 mg to shorten a cold (5–7 days), 12 mg in pregnancy. Full reference table with the 40 mg/day safe upper limit.

Business

Margins, VAT, markup, break-even, pricing.

Freelance Hourly Rate Calculator Calculate your freelance hourly rate from target income, business expenses, and billable hours. Includes self-employment tax. Results in under 30 seconds.

Profit Margin & Markup Calculator Calculate profit margin and markup from cost and selling price. Understand the critical difference between margin on cost vs margin on sale. Free, instant.

Side Hustle Tax Calculator (USA) Calculate self-employment tax, federal income tax, and net income from your side hustle. Estimates SE tax (15.3%), QBI deduction, and quarterly payments for…

Daily Life

Age, dates, percentages, rule of three, converters.

Alcohol Per Guest Calculator Calculate how much alcohol you need per guest. Estimate wine bottles, beer cans, and spirits for weddings, cocktail parties, and casual events.

Sleep Quality Calculator — Simplified Pittsburgh Index Evaluate your sleep quality with a questionnaire based on the Pittsburgh PSQI. Quick score on latency, duration, and efficiency.

Days Between Two Dates Calculator Calculate the exact number of days, business days, weeks, months, and years between any two dates. Handles leap years automatically. Free, instant.

Exact Age Calculator Exact age calculator: find your precise age in years, months, days, and hours. Calculate anyone's age. Free and instant.

Catering Cost Per Head Calculator Calculate event catering costs per guest for 2026. Estimate buffet, plated, family-style, or food truck pricing with bar, gratuity, and tax breakdowns.

Percentage Calculator Calculate any percentage: discounts, increases, percentage change, and what percent one number is of another. Formula shown step-by-step. Free, no signup.

Tip Calculator Calculate tips instantly and split bills among friends. Standard 18-20% US tipping rates, custom percentages, and per-person totals. Free tip splitter.

Rule of Three Calculator Solve direct and inverse rule of three problems. The basis for percentages, scales, conversions, and proportions. With everyday examples step by step.

Wedding Budget Calculator Calculate your wedding budget by category. Estimate venue, catering, photos & more. Average US wedding costs $33,000–$35,000 in 2026—see exactly where your money goes.

Sports

Pace, 1RM, calories burned, running, strength training.

Estimate Your 10K Time Based on Your 5K Performance Predict your 10K running time from your 5K pace using Riegel's formula. Free, accurate running pace calculator.

10K Training Plan by Level Personalized 10K training plan by fitness level. Calculate weeks, peak mileage & training blocks. Free runner's tool.

Bench Press 1RM Estimator Calculate your bench press one-rep max using the Brzycki formula. Free strength training calculator.

1RM Calculator (One Rep Max) 🏋️ Free 1RM calculator using the Epley formula. Enter any weight and reps and get your estimated one rep max plus 3RM, 5RM, 8RM, 10RM and 12RM for programming.

Deadlift 1RM Calculator (Epley Formula) Enter weight lifted and reps to instantly estimate your deadlift one-rep max using the Epley formula. Includes a full %1RM training zone table and meet attempt guide.

1RM Back Squat Calculator — Estimate Your Max (Epley Formula) Enter weight and reps to instantly estimate your back squat 1-rep max using the Epley formula. Includes a %1RM table and strength standards for novice to elite lifters.

Half Marathon (13.1 mi / 21K) Training Plan Length Calculator How many weeks to train for a 13.1-mile half marathon by background: beginner 16-20, intermediate 12-14, advanced 10-12. Jack Daniels VDOT + Hal Higdon based.

5K Training Plan by Skill Level Free 5K training plan calculator by level. Get your training duration, peak weekly mileage, and running schedule.

Daily Hydration Calculator for Athletes Athlete hydration calculator: how much water to drink based on weight, training intensity, and climate. Includes electrolyte recommendations.

Calories Burned Boxing — by Weight, Style & Duration Find out exactly how many calories you burn boxing. Enter your weight, session type (shadow, bag, sparring, kickboxing), and duration. MET-based formula used by ACSM.

Optimal Caffeine Dosage for Athletic Performance Calculate your ideal caffeine dosage for better athletic performance by body weight. Based on ISSN & EFSA guidelines. Free, instant results.

Cycling Calories Burned Cycling calories: calculate kcal burned pedaling based on speed (leisure, moderate, race, spinning, MTB), weight, and time. With estimated km traveled.

Calories Burned by Sport & Activity Calculate calories burned per sport: running, soccer, weightlifting, swimming, CrossFit, tennis, and yoga. Based on the MET Compendium of Physical Activities.

Swimming Calories Burned Calculator by Style Calculate calories burned swimming by style (crawl, breaststroke, backstroke, butterfly), weight, and duration. Includes MET table for all strokes and comparison with other sports.

Caloric Surplus Calculator for Muscle Gain Find your exact daily calories for bulking: TDEE + proven surplus by experience level. Mifflin-St Jeor BMR · beginner to advanced · free & instant.

How Many Carbohydrates Do You Need During Exercise? Calculate carbs needed per hour by duration and intensity. Reference table, gel and banana equivalents. Based on ACSM sports nutrition guidelines for runners, cyclists and endurance athletes.

Critical Power (CP) Calculator — Find Your CP and W' Calculate your Critical Power (CP) and anaerobic work capacity (W') from two all-out efforts. Enter power and duration for two time trials and get your CP threshold instantly.

CrossFit Fran Benchmark Times & Performance Levels Calculate your Fran benchmark level instantly. See how your time ranks: beginner to elite. Compare your performance against official CrossFit standards.

Energy Gel Calculator: How Many Gels Do You Need? Enter your race duration and instantly find out how many 30 g energy gels to carry. Based on the ACSM 60 g carbs/hour guideline. Includes reference table for 10K to 100-mile ultras.

Cycling FTP Calculator: 20-Minute Test Calculate your cycling FTP instantly from the 20-minute test. Enter your average watts and get your Functional Threshold Power + all 7 Coggan training zones. Free, no signup.

Body Fat % Calculator by Skinfolds Body fat calculator: estimate your body fat percentage using the Jackson-Pollock 3-site skinfold formula. Measure with calipers and get your category.

Predict Your Half Marathon Time from a 10K Result Enter your 10K race time and get your projected half marathon finish using Cameron's formula. Includes a reference table for 35–80 min 10K times.

Heart Rate Training Zones (5 Karvonen Zones) Calculate your 5 heart rate training zones using the Karvonen Heart Rate Reserve (HRR) method. Free calculator with max HR, resting HR, and zone bpm targets for endurance training.

How Much Water Should You Drink During Exercise? Calculate your exact ml per hour based on body weight, workout intensity, and weather. Includes a quick-reference table + electrolyte guide. Based on ACSM guidelines.

Max HR and Training Zones Calculator (Karvonen) HR zones calculator: compute your 5 training zones using the Karvonen formula. Max HR, fat-burning zone, cardio zone. Enter age and resting HR.

Create Your Marathon Training Plan (42K) by Experience Level Personalized marathon training plan (42K) calculator by experience level. Free tool for beginners to advanced runners. Get your training schedule.

Marathon Pace Calculator — pace per km & mile by goal time Calculate your required marathon pace per kilometer (and per mile) for any finish time goal. Enter your target time and instantly get your pace/km, pace/mile, and half-marathon split.

Calculate Your MLSS (Max Lactate Steady State) Calculate your MLSS pace for running and cycling training. Find your lactate threshold with our free threshold heart rate calculator. Instant results.

Muscle Recovery Time Calculator: How Long to Rest Between Workouts Find out exactly how many hours your muscles need to recover between sessions. Based on muscle group, intensity, age, and sleep — with a full reference table.

How Much Protein Per Meal for Muscle Growth? Find the optimal protein dose per meal to maximize muscle protein synthesis. Enter your weight and daily target — get your per-meal range backed by ISSN research. Free & instant.

Marathon Pace Calculator — Find Your Required Pace by Goal Time Enter your marathon goal time and instantly get the exact pace (min/km and min/mile) you must hold for 42.195 km. Includes a reference table for common goal times from 2:30 to 6:00.

Running Pace Calculator Calculate your running pace in min/km, min/mile, and speed (km/h, mph) from distance and time. With pace tables for 5K, 10K, half marathon, and marathon.

Padel Ranking Points Calculator — How Many to Advance Calculate exactly how many padel ranking points you need to move up a category in the AAP or APT system. Table from 7th to 1st category + minimum tournaments.

Competition Weight Calculator: Ideal Range by Sport and Height Find your ideal competition weight by sport, height, and sex. Based on sport-specific BMI ranges used by elite athletes — running, cycling, swimming, powerlifting, CrossFit, and more.

Post-Marathon Rest Days Calculator How many rest days after a marathon? Use the simple rule: race distance (km) ÷ 2. A 42.2 km marathon = 21 easy-running days before hard training. Calculate instantly for any race distance.

Rest Time Between Sets by Training Intensity Calculate optimal rest periods between sets based on intensity (% 1RM) and training goal. Free, fast, science-based.

One Rep Max (1RM) Calculator Estimate your 1RM without risk: enter weight and reps, get estimates from 3 validated formulas plus a percentage table for periodization.

Rugby Points-Per-Game & Relegation Risk Calculator Calculate your rugby team's average points per match and find out if you are in the relegation zone. Uses the official World Rugby bonus-point system (4 win / 2 draw / 0 loss + bonuses).

The 10% Rule for Running Weekly Progression Calculate your safe weekly running mileage increase with the 10% rule. Prevent overuse injuries and build fitness smarter. Free & instant.

Swimming Pace Calculator per 100m Enter any distance and total swim time to get your pace per 100m, speed in m/s, and skill level. Includes a reference table for elite, advanced, intermediate, and beginner benchmarks.

SWOLF Swimming Efficiency Calculate SWOLF index (seconds + strokes) to measure swimming efficiency. Free & fast. Lower scores = more efficient · No signup required.

Trail Running Elevation Pace Adjustment Calculator Calculate your adjusted finish time and effective pace for trail running with elevation gain. Uses Naismith's Rule: every 100m of gain = 1 extra km. Free and instant.

VO2max Calculator — Cooper Test VO2max Cooper test calculator: estimate your VO2max with the 12-minute Cooper test. Enter distance, age, and sex to know your aerobic capacity.

How Many Times Per Week Should You Train Each Muscle Group? Find your optimal weekly training frequency by muscle group — beginner, intermediate, or advanced. Backed by sports science (Schoenfeld 2016). Instant result + reference table.

How Many Sets per Muscle Group per Week? MEV & MRV Calculator Calculate your optimal weekly training volume (MEV and MRV) by muscle group and experience level. Based on Israetel's evidence-based framework. Instant, free.

Travel

Fuel costs, trip budgets, expense splitting, tips.

Gas Trip Cost Calculator Calculate road trip fuel cost by distance, MPG, and gas price. Estimate gallons needed, total cost, and split among passengers. Avg US gas $3.45/gal.

How to Split a Hotel Bill (Even or by Nights) Split a hotel room cost between friends or family in seconds. Even split or fair split by nights stayed when someone checks out early — with a per-person table.

Road Trip Time Calculator: Drive Time + ETA How long will your drive take? Enter distance, average speed, and departure time to get your exact drive time, rest breaks, and arrival ETA. Works in miles or km — free road trip calculator.

Tip Calculator by State (USA) Calculate the right tip for any US state in 2026. Enter bill, state, service quality, and party size. Get tip $, total, and per-person split instantly.

Split Travel Expenses Among Friends Split travel expenses: calculate what each person spent on a group trip and who owes whom. Up to 6 people. For trips, vacations, weekends, and more.

Construction

Bricks, cement, paint, flooring estimates.

Room Air Conditioner Sizing Calculator Calculate your room's exact cooling load in BTU/h and frigorías. Industry-standard formula: volume × 50 + people + appliances, adjusted for sun exposure and insulation.

Aluminum profile linear meters calculator for windows Calculate exactly how many linear meters of aluminum profile you need for any window type — sliding, fixed, or casement. Includes frame, panels, contraframe, and waste. Shows how many 6-meter bars to buy.

Baseboard Linear Meters Calculator Enter room dimensions and door openings to instantly get the linear meters of baseboard trim and the number of 2.4 m rods to buy — with 8% waste included.

Boiler kW per m² Calculator + Sizing Chart Find exactly how many kW your boiler needs per m². Enter your area and insulation quality — instant result with sizing chart for 50–300 m².

How Many Bricks per m² of Wall? 🔨 Calculate bricks needed by brick type & wall area. Free, fast & accurate calculations.

Bricks Per Square Meter Wall Calculator How many bricks do you need per m² of wall? Enter area, brick type, and waste %. Covers US modular (75/m²), UK standard (60/m²), hollow ceramic, concrete block, and more. Instant result.

How Many kW Does a Boiler Need per Room? Calculator Calculate the boiler kW needed for any room using the S × O × A × Z × 85 W/m² formula. Enter area, orientation, insulation and climate zone. Includes quick-reference table for common room sizes.

Tile Adhesive Bags Calculator — coverage per m² by tile size Find out exactly how many bags of tile adhesive you need. Enter area, tile size and application method — get the bag count instantly. Includes coverage table: from 8.3 m²/bag (small tiles) to 2.8 m²/bag (large-format double coat).

Ceramic Tile Calculator — Boxes, Adhesive & Grout Calculate exactly how many tile boxes you need. Enter room dimensions + tile size → instant boxes, adhesive (kg) and grout (kg). Works for 30×30 to 100×100 ceramic and porcelain.

Tile Grout Calculator — How Much Grout Do I Need? Calculate exactly how many kg of grout you need for any ceramic, porcelain, or mosaic tile job. Uses the real Mapei/Weber industry formula: tile size, joint width, thickness, and waste margin. Includes kg/m² reference table for common tile sizes.

Ceramic Tile Box Calculator: Area + Waste → Boxes Enter your area (m²) and the coverage per box to find out exactly how many boxes of tile you need — with 10% waste already included. Instant result, no signup.

Concrete Beam Sizing Calculator (h & b from Span) Find the right concrete beam height and width for your span in seconds. Uses the L/12 depth rule (ACI 318-19) with a reference table for spans 3–12 m. Free, no sign-up.

Concrete Mix Ratio Calculator — Bags of Cement, Sand & Gravel per m³ How many bags of cement per cubic meter? M20 needs 7 bags (350 kg), 0.42 m³ sand, 0.66 m³ gravel. Instant results for M10–M30. ACI 211.1 mix table included.

Continuous Footing Concrete Volume — m³ + Cement Bags Calculate concrete volume (m³) and cement bags for any continuous (strip) footing. Enter length, width, and depth — get instant material estimates. With reference table for common footing sizes.

Curtain Fabric Calculator — How Much Fabric Do You Need? (+ Reference Charts) Calculate exactly how much curtain fabric to buy per window. Window width × fullness multiplier + seam and hem allowances. Result in cm and linear meters — with fullness and heading reference tables.

Deck Board Calculator — How Many Boards for Your Deck? Calculate exactly how many deck boards you need for any patio or deck. Enter deck size, board face width, gap spacing and waste factor — instant result with reference chart included.

Door Hinge Calculator: How Many Hinges and Screws Do You Need? Enter door height, weight, and count — get the exact number of hinges and screws to buy, including a waste buffer. Uses the industry-standard 1 hinge per 30 inches (75 cm) rule. Free, instant.

Drain Grate Size by Fixture Type — IPC Code Reference Find the correct drain grate diameter for any fixture: shower, kitchen sink, patio, or floor drain. IPC code table + worked examples. Free.

Electrical Cable Size Calculator: Wire Gauge by Amperage and Distance Find the correct copper wire gauge (mm²) for any circuit based on current (amps), run length (m), and voltage. Applies IEC 60364 voltage-drop and ampacity criteria. Includes reference table.

What Wire Gauge Do I Need Based on Amperage and Distance? Calculate electrical wire gauge (mm²) by amperage, distance, and voltage. Prevent voltage drop over 3%. Includes breaker sizing recommendations.

Furniture Paint Coverage Calculator: How Many Cans You Need Calculate exactly how many cans of paint or varnish you need for furniture. Enter surface area, number of coats, and product coverage rate → instant result with reference table by finish type.

Garden Soil Calculator: How Much Soil Do I Need for My Raised Bed? Calculate exactly how much soil you need for your garden bed, raised bed, or planter. Enter length, width, and depth — get volume in m³, litres, and number of bags, with the 15% settling allowance included. Free, accurate, no sign-up.

Grass Seed Calculator per m² — Exact Quantity by Type & Purpose Enter your lawn area and grass type to get the exact seed quantity in grams or kg. Covers all major species (ryegrass, fescue, bermuda, bluegrass) for new lawns and overseeding. Includes a complete seeding rate table.

Isolated Footing Size Calculator by Column Load Calculate isolated footing area and square side from column load and allowable soil bearing capacity. Reference table for common loads. Free, no registration.

Melamine Board Cutting Calculator — Pieces, Yield & Sheets Needed Enter board size, piece size, and kerf — instantly see how many pieces fit per sheet, material yield %, waste, and total boards to buy. Free cut-list calculator for cabinetry and DIY.

How Many Asphalt Membrane Rolls Do I Need? Enter your area in m² and get the exact number of asphalt (bitumen) membrane rolls needed — 10% overlap included. Instant result, no sign-up. Works for roofs, slabs, foundations.

Paint Coverage Calculator: How Many Liters for Your Walls? Calculate exactly how much paint you need for any room. Enter wall area, coverage rate, and coats — get liters to buy with waste buffer. Free, instant, no signup.

How Much Paint Do I Need? Calculate Liters by m² and Coats Calculate exactly how many liters (or gallons) of paint you need. Enter area, number of coats, and coverage rate for an instant, accurate estimate.

Brick Perimeter Wall Calculator — Bricks, Mortar & Footing How many bricks do you need for a perimeter wall? Enter lot perimeter, height, and gate openings — get bricks (or CMU blocks), mortar bags, footing concrete, and pillar count instantly.

How Much Roof Waterproofing Do You Need? kg/m² Calculator Calculate exactly how many kg of liquid or membrane roof waterproofing you need. Enter your roof area and product type — get the total kg instantly. Coverage table included.

Rough Plaster Mortar Calculator: m³, Cement Bags & Sand Calculate exactly how much mortar, cement bags, and sand you need for rough plaster (scratch coat). Enter wall area and thickness — get m³, bag count, and sand volume instantly. Free, no sign-up.

Solar Panel kW System for Your Home Calculate how many solar panels and how many kW you need to cover your home's electricity bill. Real formula: monthly kWh ÷ (panel kWp × Peak Sun Hours × efficiency). Free, instant result.

How Many BTU Do I Need for My Split AC? Calculator by m² Enter your room size and climate zone and get the exact BTU your split AC needs, plus the frigorías equivalent. Formula: BTU = m² × climate factor (600–850 BTU/m²).

Stair Calculator — Blondel's Rule (2R + T = 63–65 cm) Calculate stair riser height and tread depth using Blondel's Rule (2R + T = 63–65 cm). Get step count, tread, and riser instantly — with reference table and code compliance check.

Steel (kg/m²) per Concrete Slab — Calculator + Reference Table How many kg of rebar per m² of concrete slab? Instant estimate by slab type (solid, ribbed, precast) with a full reference table. Free, no sign-up.

Maximum K-Value by Bioclimatic Zone — Argentina (IRAM 11605) Instantly look up the maximum allowed thermal transmittance (K-value, W/m²K) for walls in each Argentine bioclimatic zone under IRAM 11605. Includes full compliance table for all 6 zones, insulation examples, and a plain-language explanation architects and engineers can cite.

Tile Boxes Calculator: How Many Boxes Do I Need? Enter your area (m²), coverage per box, and waste % — get the exact number of tile boxes to buy. Includes size chart for common tiles (20×20 to 60×120 cm) and waste factors by pattern.

Room Ventilation CFM Calculator Calculate the exact CFM needed for any room in seconds. Enter length, width, height and air changes per hour — get CFM + m³/h instantly. Includes ACH reference table for bathrooms, kitchens, offices and more.

Water Heater Size Calculator — Right Tank Capacity per Person Calculate the exact water heater tank size for your household. Enter number of people + usage intensity and get an instant recommendation in liters and gallons — using the same DOE/ENARGAS plumber-grade method.

Water Pipe Diameter Calculator — Flow Rate to Pipe Size Enter your flow rate (L/s) and get the minimum pipe diameter instantly. Includes a table of common flow rates vs. standard pipe sizes (13–110 mm). Uses Q = V × A at 1.5 m/s, the recommended velocity for residential plumbing.

Water Pump Power Calculator (Watts & HP) Calculate water pump power in watts and HP from flow rate, head, and efficiency. Includes a pump sizing table for common applications — rooftop tanks, irrigation, wells. Free, no signup.

Water Tank Size Calculator: How Many Liters Do You Need? Instantly find the right water tank capacity for your home. Enter the number of people and backup days — get liters needed and the closest commercial tank size.

Cooking

Cups to grams, recipe scaling, cooking conversions.

Baker's Percentage Calculator — Flour, Hydration & Ingredient Weights Calculate exact ingredient grams from baker's percentages. Enter flour weight or target dough weight, hydration %, salt, yeast, and extras — get a precise breakdown in seconds. Includes hydration class guide + reference table.

Barrel Aging Time Calculator — How Long to Age Whiskey by Barrel Size Find out exactly how long to age whiskey, rum, or gin in your barrel. Small barrels age 3–6× faster than a 200L cask. Free calculator + aging chart for any barrel size.

How Much Meat Per Person for a BBQ Find out exactly how much raw meat to buy per person for your BBQ. Enter your headcount, cut type, appetite, and sides — get the answer in kg instantly. Free BBQ meat calculator.

Birthday Cake Servings Calculator by Pan Size Find out exactly how many people your cake serves based on pan diameter or dimensions. Includes serving chart for round, square, and rectangular pans — party, wedding, and kids' portions. Based on Wilton industry standard.

Bread Rising Time Calculator — Temperature, Yeast Type & Dose How long does bread dough take to rise? Calculate proofing time by dough temperature, yeast type (fresh, active dry, instant), and percentage. Real Q10 fermentation formula + quick-reference table.

How Many Burgers Per Person for a Party? Calculate exactly how many burgers you need per person for any party or BBQ. Rule: 2 burgers/adult (main dish) + 15% buffer. Get total burgers and pounds of ground beef instantly.

Coffee to Water Ratio Calculator Find the exact coffee and water amounts for drip, French press, AeroPress, espresso, and cold brew. Uses SCA Gold Cup ratios. Results in grams and fl oz.

Complete Vegan Protein Combinations Check if your plant-based dish covers all 9 essential amino acids. Lentils+rice, hummus+pita, tofu+quinoa and more — PDCAAS score instant.

Cups to Grams Calculator — Flour, Sugar, Oil & 18 Baking Ingredients Convert cups to grams instantly: 1 cup flour = 120 g, sugar = 200 g, oil = 220 g. Free converter covering 18 baking ingredients with full reference table. Based on King Arthur Baking + USDA.

Cups to Grams Converter (Baking) Convert any number of cups to grams for flour, sugar, butter, oil, milk, honey and 17+ baking ingredients. USDA and King Arthur densities. Free and instant.

How much dry pasta per person? Calculate exactly how many grams (or oz) of dry pasta you need per person: 80g for a regular main, 60g side dish, up to 150g for athletes. Includes reference table by hunger level.

Egg Size to Grams: White, Yolk & Edible Weight How many grams is a Large egg? White ≈ 33 g, yolk ≈ 18 g, edible ≈ 52 g. Full USDA size-to-grams chart (Small → Jumbo) + free calculator for baking and meal prep.

How Many Empanadas Per Person for Your Party or Event Calculate exactly how many empanadas to order per guest for any event. Enter guest count, serving role (snack, appetizer, main course, sole dish), and number of kids. Instant result in pieces and dozens with a 12% safety buffer.

How Much Ground Coffee Per Cup (by Brewing Method) Find out exactly how many grams of ground coffee you need per cup for espresso, V60, French Press, drip, AeroPress, moka, and cold brew. Ratio table + tablespoon conversion included.

Homemade Chocolate Bonbons Calculator Calculate exactly how many grams of couverture chocolate you need for homemade bonbons. Enter piece count, weight per bonbon, filling %, and tempering waste — get instant result plus a reference table by mold type.

Pizza Dough Calculator — Exact Grams by Number of Guests Enter your guest count and pizza style: get exact grams of flour, water, yeast, salt and oil. Uses baker's percentage — the same method professional pizzerias use to scale recipes.

Beer IBU Calculator Using Tinseth Formula Calculate beer IBU (bitterness) units with the Tinseth formula. Input hops, alpha acids, boil time & volume. Free homebrewing calculator.

How Much Ice Do I Need for a Party? Enter guests, hours, and temperature to instantly calculate exactly how much ice you need — in kg, 20-lb bags, and individual cubes. Uses the catering industry standard formula + 20% melt buffer.

16/8 Intermittent Fasting Calculator — Find Your Eating Window Enter your last meal time and get your exact break-fast time and eating window. Supports 16/8, 18/6, and OMAD protocols. Free, instant, no signup.

Keto Macros Calculator — fat, protein & carbs for ketosis Enter your daily calories and goal (cut, maintain, or gain) to get exact grams of fat, protein, and carbs for a ketogenic diet. Includes the standard 72/23/5% keto split and a reference macro table.

Oven Temperature Conversion: °F, °C, and Gas Mark Convert oven temperatures between °F, °C, and Gas Mark instantly — plus convection fan oven adjustment (−25°F/−14°C). Includes a full reference table: 250°F to 500°F with heat descriptions.

Gas Mark to Celsius Converter — Oven Temperature Chart (°C, °F & Fan) Convert gas marks to Celsius and Fahrenheit instantly. Gas mark 4 = 180°C = 356°F. Full table: marks ¼ to 9, fan oven adjustment included. Free calculator.

How Many Drinks for a Party? Beer, Wine & Soda Calculator Enter guests and hours — get exact cases of beer, wine bottles, and soda 12-packs. Uses the caterer's 2+1/hour rule with a 15% safety buffer. Free and instant.

How Many Pizzas Do I Need? Pizza Party Calculator Enter your guest count and occasion type to instantly know how many pizzas to order. Uses the catering 3/8 rule + 10% safety buffer. Includes a quick-reference table for 5–50 guests.

Sushi Per Person Calculate sushi portions: 10-12 pieces or 2-3 rolls per person. Free online tool with party and catering sizes. Calculate now.

Priming Sugar Calculator — Exact Grams for Bottle Conditioning How much priming sugar do you need? Enter beer volume, target CO₂ volumes, fermentation temp and sugar type. Get exact grams for dextrose, table sugar, DME or honey — with a quick-reference chart by beer style.

Recipe Scaling Calculator — Instantly Scale Any Recipe Up or Down Scale any recipe to any serving size in seconds. Enter your original servings, target servings, and up to 5 ingredients. Smart unit conversion and baking-specific leavening adjustments included.

How Much Rice Per Person? Grams Calculator Quickly calculate how many grams of raw rice to cook per person. Enter group size, meal type (side, main, sushi), and whether children are at the table. Instant result in grams and cups with water ratios.

How Much Rice Per Person as a Side Dish? 60 g dry rice per person = ~180 g cooked. Use this calculator to get the exact grams of uncooked rice for your headcount, plus water needed and cooked yield. Instant, free.

Vanilla Pound Cake Recipe Scaler — get exact ingredient amounts for any serving size Scale your vanilla pound cake recipe to any number of servings instantly. Get exact grams for butter, sugar, flour, eggs, vanilla, baking powder, salt, and milk — plus an estimated bake time and a quick-reference scaling table.

Beer Color SRM Calculator — Morey Formula with Style Chart Calculate your homebrew's SRM color using the Morey equation (SRM = 1.4922 × MCU^0.6859). Input malt weights, Lovibond degrees, and batch volume. Get SRM, EBC, and matching BJCP styles instantly.

Teaspoon to Grams Calculator — Salt, Sugar, Spices & More Convert teaspoons to grams instantly. 1 tsp fine salt = 6 g, sugar = 4 g, baking soda = 4.8 g, oregano = 1 g. Full table of 20 ingredients with real USDA densities.

Vegetable Cooking Times: Steam vs Boil How long to steam broccoli? How long to boil potatoes? Get exact cooking times for 20 common vegetables — broccoli 4–6 min steamed, potato 12–18 min boiled. Instant reference with a full chart.

How long to infuse vodka with fruits, herbs & spices Calculate optimal vodka infusion time by ingredient: citrus 3–5 days, berries 2–4 days, vanilla 2–4 weeks. Full chart + ratios for homemade limoncello & flavored vodka.

Optimal Water Mineralization for Specialty Coffee Calculate water hardness and mineralization for specialty coffee. SCA standards: TDS 75-250 ppm, hardness 50-175 mg/L, pH 6.5-7.5. Optimize your brewing.

Pets

Dog/cat age, feeding, medication by weight.

Convert Your Cat's Age to Human Years Instantly convert your cat's age to human years using the official AAFP/AAHA 2021 formula. Get your cat's life stage and vet care recommendations. Free, no sign-up.

How Much Should I Feed My Cat per Day? (grams calculator) Calculate how many grams of cat food your cat needs per day based on weight and life stage. Vet-based RER/MER formula (WSAVA/AAHA). Includes dry vs wet food chart. Free.

Dog Age in Human Years by Breed Find out how old your dog really is in human years by breed and size. Uses the 2020 AVMA logarithmic formula — far more accurate than the old 7× rule. Instant results.

Dog Years to Human Years Calculator (by Size) Convert your dog's age to human years instantly. Uses the AAHA size-adjusted formula — not the outdated "×7" rule. Includes a conversion chart for small, medium, large, and giant breeds.

Dog Breed Apartment Compatibility Calculator Find out if your dog breed is suitable for apartment living. Enter breed, apartment size, and hours alone per day — get a compatibility score (1–10) with expert recommendations.

How Many Calories Does My Dog Need Per Day? Find out exactly how many calories your dog needs daily. Enter weight, age, and activity level — get kcal/day and grams of dry food using the veterinary MER formula (AAHA / WSAVA standard).

How Much Should I Feed My Dog? Daily Food Calculator by Weight Find out exactly how many grams of dry dog food to feed your adult or senior dog per day. Uses the veterinary RER/MER formula (NRC). Enter weight and life stage — get instant results.

How Often Should You Brush Your Dog? By Coat Type & Season Find out how many times per week to brush your dog based on coat type and season. Reference table for short, medium, long, double coat (Husky, German Shepherd), curly, and wire coats. Based on AKC and WSAVA grooming guides.

Dog Vaccine Calendar for Puppies & Adults Find out which vaccines your dog needs right now based on age and vaccination history. Covers core WSAVA vaccines (distemper, parvovirus, adenovirus, leptospirosis) and rabies. Free, 2026-updated guide.

How Many Minutes Should You Walk Your Dog? (By Breed & Age) Find out exactly how many minutes to walk your dog each day by breed energy level, size and life stage. Border Collie: 80–100 min/day; Bulldog: 25–30 min. Includes quick-reference table.

When to Spay Your Female Dog or Cat (by Breed Size) Find the evidence-based spay age for your dog or cat. Cats: 4–5 months. Small dogs: 5–6 months. Large dogs: 9–12 months. Giant breeds: 12–18 months. Based on AAHA 2019 guidelines.

Fish Tank Size Calculator: How Many Liters Per Fish? Calculate the minimum aquarium volume in liters for your fish. Species-adjusted: 1 L/cm for slim tropicals, 2 L/cm for cichlids, 3 L/cm for goldfish, 5 L/cm for marine fish. Instant result.

Guinea Pig Vitamin C Daily Dosage Calculator How much vitamin C does your guinea pig need? Calculate the exact daily dose in mg based on weight and health status. Based on Merck Veterinary Manual ranges. Free.

How much should I feed my ferret? Daily food & protein calculator Calculate your ferret's daily food amount and minimum animal protein by body weight and life stage. Reference tables for adults, kits, pregnant and senior ferrets — based on veterinary guidelines.

Parrot & Budgie Weekly Food Calculator: Seeds, Fruit & Pellets by Weight Enter your bird's species and weight in grams to get exact weekly amounts of seeds, fresh fruit & vegetables, and formulated pellets. Based on AAV and Merck Veterinary Manual guidelines. Free, instant results.

Dog & Cat Age in Human Years: Size-Adjusted Calculator Convert your dog or cat's age to human years using size-adjusted formulas — not the outdated ×7 rule. Small, medium, large, and giant breeds. Instant results.

Pet Medication Dosage Calculator — mg and ml by Weight Calculate exact dog or cat medication doses in mg and ml from weight (kg), concentration (mg/ml) and doses per day. Verify any vet prescription instantly.

Puppy First-Year Costs: What to Budget Calculate total first-year puppy expenses including vaccinations, food, vet care, spaying/neutering, and supplies. Get breed-specific estimates.

Rabbit Age in Human Years — Calculator + Conversion Chart Find out how old your rabbit is in human years. Enter age and breed size (dwarf, medium, giant) and get the exact equivalent, life stage, and lifespan — with a full conversion chart.

How Much Should I Feed My Rabbit? Hay, Pellets & Vegetables by Weight Find out exactly how much hay, pellets and vegetables your rabbit needs daily — by weight and life stage. 80/15/5 rule: unlimited grass hay, 100 g veg/kg, pellets capped at 50 g/day. Free.

How Much to Feed a Water Turtle: Calculator by Weight & Age Calculate exact gram portions for your aquatic turtle by body weight and life stage. Vet-aligned protocol: hatchlings 3%, juveniles 2%, adults 1% of body weight per session. Includes feeding frequency chart and diet breakdown.

Math

Average, Pythagoras, quadratic, factorial, GCD.

Cramer's Rule Calculator: Solve Any 2×2 Linear System Solve ax+by=e, cx+dy=f instantly with Cramer's Rule. Enter the 6 coefficients and get x, y, and the determinant — plus a step-by-step explanation.

2×2 Matrix Determinant and Inverse Calculator Find the determinant and inverse of any 2×2 matrix instantly. Enter a, b, c, d — get det = ad−bc and A⁻¹ = (1/det)×[[d,−b],[−c,a]] in one click.

Annual Salary to Hourly Rate Calculator Convert any annual salary to hourly, daily, weekly, and monthly pay instantly. Includes a reference table for common salaries ($30k–$200k) and the exact formula used by the U.S. OPM.

Circle Area, Perimeter, and Sector Calculator Calculate circle area (π×r²), perimeter (2πr), sector area, and arc length instantly. Enter the radius — optionally add an angle for sector calculations. Includes formula, reference table, and worked examples.

Circle Area and Circumference Calculator Enter any radius and instantly get circle area (πr²), circumference (2πr), and diameter. Includes reference table for common radii and step-by-step formulas.

Arithmetic Sequence Calculator — nth Term & Sum Find the nth term (aₙ) and sum (Sₙ) of any arithmetic sequence instantly. Enter first term a₁, common difference d, and n — get aₙ and Sₙ with a step-by-step explanation and reference table.

Convert Between Binary, Decimal, and Hexadecimal Instantly convert between binary, decimal, and hexadecimal. Enter any number, pick your source and target base, get the result immediately. Includes a full reference table and step-by-step explanation.

Binomial Probability Calculator — P(X=k) Calculate exact binomial probability P(X=k) for n trials with probability p. Instant results with mean, variance, and a reference table for common values.

Binomial Probability Calculator — Calculate P(X=k) Binomial probability calculator: calculate exact P(X=k) for any number of trials. Formula C(n,k)·p^k·(1-p)^(n-k). Free online calculator.

Combinations Calculator C(n,k) — n choose k Calculate C(n,k): how many ways to choose k items from n when order doesn't matter. Formula n!/(k!(n-k)!), Pascal's triangle table, Powerball odds, and poker probabilities.

Cone Volume Calculator — V = (1/3)πr²h Calculate cone volume, slant height, and surface area instantly. Enter radius and height — get V = (1/3)πr²h, slant height l = √(r²+h²), and total surface area in one click. Free, no sign-up.

BTU to kcal Converter for Air Conditioning Convert BTU/hr to kcal/hr instantly. 1 BTU = 0.251996 kcal. Free calculator + reference table for sizing AC units — works both ways.

Celsius to Fahrenheit & Kelvin Converter Convert Celsius to Fahrenheit (and back) instantly. °F = °C × 1.8 + 32. Quick reference: 0°C = 32°F · 37°C = 98.6°F · 100°C = 212°F. Free, no signup.

Degrees to Radians Converter (+ Radians to Degrees & Gradians) Instantly convert degrees to radians, radians to degrees, and gradians. Includes a full reference table of common angles (30°, 45°, 60°, 90°, 180°, 360°) and exact conversion formulas used in math, physics, and programming.

Convert Fahrenheit to Celsius (and Back) Instantly convert °F to °C or °C to °F. Formula: °C = (°F − 32) × 5/9. Includes a full reference chart with 16 key temperatures — body temp, boiling point, oven temps, and more.

Gallons to Liters Converter (US & UK gallon) 1 US gallon = 3.78541 L | 1 UK gallon = 4.54609 L. Convert gallons to liters instantly using the exact NIST factor. Includes quick-reference table and US vs UK gallon comparison.

Meters to Feet Calculator — Exact Factor + Reference Table Convert meters to feet instantly. Exact factor: 1 m = 3.28084 ft (1 ft = 0.3048 m). Reference table for heights, altitudes, and distances. Bidirectional, free, NIST-accurate.

Miles to Kilometers Converter (+ km to miles) Convert miles to kilometers instantly. 1 mile = 1.609344 km exactly (NIST). Works both ways. Includes reference table for common running, driving, and cycling distances.

Convert Ounces to Grams for Cooking Convert ounces to grams (or grams to ounces) instantly for any recipe. Exact factor: 1 oz = 28.3495 g. Reference table, worked examples, and FAQ.

PPM to mg/L Converter (Water Chemistry) Convert PPM to mg/L or mg/L to PPM instantly. In water, 1 ppm = 1 mg/L exactly. Includes WHO reference table for drinking water, pools, and hydroponics.

Cylinder Volume Calculator (V = π·r²·h) Calculate cylinder volume instantly with V = π·r²·h. Enter radius and height to get volume in cm³, liters, and surface area. Reference table included.

Distance Between Two Points Calculator Calculate the distance between two points on a Cartesian plane instantly. Euclidean distance formula, step-by-step example, and reference table of classic Pythagorean triples.

Factorial Calculator (n!) with Reference Table Calculate n! instantly. Enter any non-negative integer and get the exact factorial value with a reference table from 0! to 20!, worked examples for permutations and combinations, and Stirling's approximation.

Factorial, Combinations, and Permutations Factorial calculator: compute n!, combinations C(n,r), and permutations P(n,r). Great for statistics, probability, combinatorics, and lottery. With BigInt.

GCD & LCM Calculator — Greatest Common Divisor and Least Common Multiple Enter any two positive integers and instantly get their Greatest Common Divisor (GCD) and Least Common Multiple (LCM) via the Euclidean algorithm. Includes reference table, step-by-step, and coprime detection.

Geometric Progression: nth Term & Partial Sum Free geometric progression calculator 2026: find nth term and partial sum instantly. Covers finance, physics, biology and CS uses. Calculate now.

Hourly to Annual Salary Calculator Calculate your annual salary from an hourly wage. Enter your rate, hours/week, and weeks worked to get annual, monthly, biweekly, weekly, and daily pay.

Hours Between Two Times Calculator Calculate exact hours and minutes between any two clock times. Handles overnight shifts automatically, deducts break time, and shows results in decimal hours, HH:MM, and total minutes — free and instant.

Convert Inches to Centimeters — TV, Monitor & Phone Screen Sizes Convert any screen size from inches to cm or cm to inches instantly. Exact factor: 1" = 2.54 cm. Includes reference table for the most common TV and monitor sizes (32", 43", 55", 65", 75").

Simple Interest Calculator (I = P × r × t) Calculate simple interest in seconds: enter principal, annual rate, and time (years, months, or days). Get total interest, final amount, and monthly/daily breakdowns. Includes worked example and simple vs. compound table.

kg to lbs Converter — Kilograms to Pounds (and Back) Convert kg to lbs instantly. 1 kg = 2.20462 lb — enter any weight and get the exact result. Includes a full reference table for common values and the exact formula.

Logarithm Calculator — Any Base Calculate log base 2, 3, 5, 10, e, or any base instantly. Enter x and b → get log_b(x) with step-by-step interpretation. Free, no signup.

Mean, Median, Mode & Range Calculator Calculate mean, median, mode, and range instantly. Paste any comma-separated dataset — get all four descriptive statistics with interpretation and step-by-step formulas.

Percentage Increase & Decrease Calculator Calculate % change between two numbers instantly. Formula: ((New − Old) / Old) × 100. Includes a reference table of common increases and decreases. Free, instant results.

Percentage of a Number Calculator Find what x% of a number equals, or calculate what percentage A is of B. Instant results, worked examples, and a handy reference table.

Percentile Calculator — Find Where Any Value Ranks Enter your dataset and a value to instantly find its percentile rank, quartile, and Q1/Q2/Q3 thresholds. Works for exam scores, test results, health measurements, and any numeric data.

P(n,k) Permutations Calculator — nPr Formula Calculate permutations P(n,k) instantly. Enter n (total items) and k (chosen), get the ordered arrangements count. Includes reference table for P(5,2)=20, P(10,4)=5040, P(8,3)=336.

Pythagorean Theorem Calculator Calculate the hypotenuse or a leg of a right triangle using the Pythagorean theorem. Also get area, perimeter, and angles. With Pythagorean triples.

Polynomial Derivative Calculator (Power Rule) Instantly differentiate any polynomial using the Power Rule. Enter coefficients from highest to lowest degree — get the exact derivative expression, step-by-step logic, and a table of worked examples.

Polynomial Integral Calculator Instantly compute the indefinite integral of any polynomial using the Power Rule. Enter coefficients, get the antiderivative with +C, plus a worked example and reference table.

Average Calculator: Mean, Median & Mode — 9 Stats at Once Paste any list of numbers and instantly get mean, median, mode, standard deviation, variance, range, min, max, and count. Free, no signup, works in your browser.

Quadratic Formula Calculator — Solve ax²+bx+c=0 Instantly Solve any quadratic equation ax²+bx+c=0 with the quadratic formula. Get both roots (x₁, x₂) and the discriminant (Δ = b²−4ac) instantly — handles real, repeated, and complex roots.

Quintal to Metric Ton Calculator Convert quintals to metric tons instantly. 1 metric quintal = 100 kg = 0.1 metric ton; 1 metric ton = 10 quintals. Free converter with reference table for grain, agro and logistics.

Radians to Degrees Converter (+ Reference Table) Convert radians to degrees instantly — and degrees to radians. Key fact: 1 rad ≈ 57.2958°. Includes a full reference table for π/6, π/4, π/3, π/2, π and more.

Ratio Simplifier Calculator Simplify any ratio A:B or A:B:C to lowest terms instantly using GCD. Get the decimal value, percentage breakdown, equivalent ratios, and scale to any total. Works for recipes, aspect ratios, finance, and more.

Rule of Three Calculator — Direct & Inverse Proportion Solve any direct or inverse proportion in seconds. Enter three known values and the calculator finds the missing fourth. Includes worked examples, formula, and a reference table.

Linear Regression Calculator (Least Squares) Paste comma-separated X and Y values to instantly get slope (m), intercept (b) and R² via ordinary least squares. Includes formula, worked examples and R² interpretation table.

Sine, Cosine, and Tangent Calculator Instantly calculate sin, cos, and tan of any angle in degrees or radians. Includes a reference table of exact trig values, worked examples, and the Pythagorean identity.

Sphere Volume and Surface Area Calculator Instantly calculate sphere volume (4/3πr³) and surface area (4πr²) from any radius. Includes reference table for common radii — the fastest sphere calculator online.

Square Feet to Square Meters Converter (ft² ↔ m²) Convert square feet to square meters instantly. 1 ft² = 0.09290304 m² (exact). Free real estate calculator with conversion table — works both ways.

Standard Deviation & Variance Calculator Calculate standard deviation (σ or s) and variance (σ²) for any dataset — population or sample. Instant results with step-by-step explanation, reference table, and worked examples.

Time Card Calculator (Hours Worked) Calculate weekly hours worked, regular vs. overtime (over 40 hrs), and gross pay. Enter clock-in, clock-out, and lunch break for each day.

Triangle Area Using Heron's Formula (3 Sides) Calculate triangle area from three side lengths using Heron's formula. Instant result, step-by-step breakdown, and a reference table of common triangles. No height needed.

Unit Converter — Length, Weight, Volume & Temperature Instantly convert miles to km, kg to lb, °C to °F, gallons to liters and 20+ more units. Exact international factors — no rounding, no sign-up. Includes quick-reference tables.

Education

Grades, averages, credits, scholarships.

10,000-Hour Rule Calculator — How Long to Master a Skill? Enter your weekly practice hours and see exactly how many years to reach 10,000 hours — Gladwell's mastery threshold. With reference table for common schedules.

Hours to Master a Skill: 80/20 Learning Curve Calculator Enter your total target hours and weekly practice time to get the exact weeks to reach mastery. Uses the 80/20 Pareto principle and deliberate practice research by Ericsson.

Anki Daily Flashcards Calculator Calculate daily Anki cards based on vocabulary goals and study time. Free spaced repetition learning calculator.

How Many Hours for Bilingual Kids? Find out how many hours your child needs for active bilingualism. Free calculator based on Pearson & De Houwer research.

How Long Does It Take to Read a Book? Calculate reading time based on pages and speed. Instant results for any book—see exactly how many hours you need. Free & accurate.

How Long Does It Take to Read a Book? Enter page count, daily minutes, and genre — get your finish date instantly. Includes a table for 200–800 page books at common reading paces. Free, no sign-up.

Chess ELO rating change calculator Calculate your new chess Elo rating after a game. Enter both ratings, the result and the K-factor to see your exact rating change and win expectancy.

Cornell Notes Study Time Calculator Find out exactly how long Cornell note-taking takes per chapter. Enter pages, chapters, and difficulty — get a breakdown of Record, Reduce, Recite, Reflect, and Review time.

Daily Duolingo study time by CEFR level Calculate daily Duolingo minutes needed to reach A1-C2 CEFR levels. Science-backed estimates with spaced repetition. Free calculator.

Ebbinghaus Forgetting Curve Calculate the Ebbinghaus forgetting curve exponent (t/S): enter days elapsed and memory stability to determine whether it's time to review — and estimate your current retention.

English CEFR Level Progression: Hours & Timeline Calculator Enter your current CEFR level (A1–C1) and weekly study hours — get the exact weeks to your next level and total hours to C1. Based on Cambridge English research. Includes a full A1–C2 hours table.

English Study Hours by MCER Level (FSI Method) Calculate hours needed for each MCER level (A1–C2) using FSI study estimates. Free, accurate, and updated for 2026.

How to Calculate Study Time by Exam Difficulty Calculate study hours needed based on pages, difficulty, and retention. Free calculator for exam prep. Estimate your study time instantly.

Final Grade Calculator — What Do I Need on the Final? Instantly find out what score you need on your final exam to reach your target course grade. Enter your current grade, the final's weight (%), and your goal grade — get the exact number in seconds.

Calculate Your Daily Flashcard Study Goals Calculate daily new cards and reviews needed to memorize X words in Y months using proven spaced repetition.

GPA Calculator — Convert Grades to the 4.0 Scale Convert your grade or average to the US GPA 4.0 scale instantly. See your letter grade band (A/B/C/D), whether you qualify for honors, and a full conversion table for common grades.

How Long Will It Take to Graduate? Find out exactly when you'll graduate. Enter your total courses, courses completed, courses per semester, and pass rate — get your realistic graduation date instantly.

High School GPA Calculator Calculate your high school GPA instantly from any grading scale. Free, no login required — see your academic standing in seconds.

Can You Learn Two Languages at Once? Viability Calculator Find out if learning two languages simultaneously is feasible with your daily schedule. Calculate effective study minutes per language after cross-linguistic interference — free & instant.

IELTS to TOEFL Score Conversion Calculator Convert IELTS to TOEFL iBT (or vice versa) and get your CEFR level instantly. Full concordance table with all bands — from IELTS 5.0 / TOEFL 35 up to IELTS 9.0 / TOEFL 120.

How Much Does Private University Cost in Argentina? Calculate annual tuition costs at Argentina's top private universities including ITBA, UTDT, and UdeSA for 2026.

How Long Does It Take to Learn a Language? Estimate weeks and hours to reach B2 level. Free calculator using FSI guidelines for 8+ languages. Based on study hours per week.

Reading Speed Calculator (Words Per Minute) Find out how fast you read in seconds. Enter words read + time, get your WPM instantly — plus a norms table by grade level and adult benchmarks from research.

Books Per Month Calculator: Hit Your Annual Reading Goal Enter your annual reading goal and months left — instantly see how many books per month, days per book, and daily reading minutes you need. Chart included.

UBA Medicine Entrance Calculator Calculate your UBA medicine entrance chances. Find out what CBC average you need to get into medicine at UBA.

Calculate Your Daily Anki Cards Calculate daily Anki cards based on your learning goal. Optimize spaced repetition with our free calculator.

What Grade Do I Need on My Final to Pass? Enter your passing minimum, total exams, grades already earned, and exams left — get the exact score you need in seconds. Works for any grading scale (0–10, 0–100, letters).

Optimal Exam Review Schedule Plan your spaced exam reviews to peak before test day (SAT, GRE, MCAT, USMLE). Maximize retention with science-backed timing. Try free online now.

Pomodoro Timer Calculator — How Many Pomodoros Fit Your Session? Enter your available time and get the exact number of Pomodoro blocks, short breaks, and long breaks that fit — with real focus time, session duration, and a visual breakdown. Works for 25/5, 50/10, and any custom variant.

Calculate Your Daily Pomodoro Sessions Calculate effective Pomodoro sessions per day. Optimize your focus time with the proven 25-minute interval technique.

Book Reading Time Calculator (WPM → Hours & Minutes) Enter your reading speed (WPM) and total word count to instantly find how long any book will take. Includes average WPM table and word counts for 20+ popular books.

Scholarship Minimum GPA Calculator Calculate your GPA by dividing the sum of your grades by the number of courses, and check whether you meet the minimum required by Progresar, Bicentenario, CIN, Fulbright, Chevening, and other scholarships.

Track Your Speed Reading Progress Monitor your WPM improvements month-by-month with our free speed reading progress tracker. See instant, measurable results.

Calculate Your Complete Study Abroad Budget Estimate total study abroad costs: tuition, housing, food, insurance, travel & more. Free calculator for international university planning.

Teacher Competition Score Calculator Calculate your total teaching competition score by entering points for degrees, seniority, publications, and courses. Instant result with level rating — no sign-up needed.

How long does it take to write a thesis? Enter your thesis word count and weekly writing pace to get your realistic timeline in weeks and months. Includes benchmark tables for Bachelor's, Master's, and PhD theses.

UBA CBC Regular vs Libre Status Calculator Check your UBA CBC academic standing instantly. Enter attendance % and midterm scores — know if you're Regular (can sit final) or Libre (failed). 75% attendance + score ≥ 4 on each exam required.

UBA XXI Final Grade Calculator (40% Coursework + 60% Exam) Calculate your official UBA XXI grade instantly: enter your coursework average and final exam score and get the weighted result (40/60). Includes passing/failing check and grade table.

Find Your Vocabulary Level: Words by CEFR Proficiency Active vocabulary targets: A1 500, A2 1000, B1 2000, B2 4000, C1 8000 words. Calculate your language proficiency level instantly.

Vocabulary Level Calculator — Words Known to CEFR Level Enter how many words you know and instantly get your CEFR level (A1–C2). Includes a full table: how many words for B1, B2, C1, and fluency. Free, no signup.

Weighted Grade Average Calculator Calculate your weighted grade average by credit hours using the standard Σ(grade × credits) ÷ Σ(credits) formula. Works with 4.0 GPA scale and 0–10 scales. Free, instant, no signup.

Automotive

Fuel consumption, insurance, registration fees.

Oil Change Interval Calculator Enter your current km and oil type to find exactly when your next oil change is due. Intervals: conventional 5,000 km · semi-synthetic 7,500 km · full synthetic 10,000 km · long-life 20,000 km.

Calculate Annual Car CO2 Emissions Calculate annual CO2 emissions from your car based on fuel consumption. Free tool updated for 2026.

Calculate Your Car Insurance Monthly Premium Estimate your monthly car insurance payment based on vehicle value and coverage type. Free, fast, and updated for 2026.

Car Loan Payment Calculator Calculate your fixed monthly car loan payment using the French amortization method. Enter loan amount, term, and annual rate — get the exact monthly payment, total paid, and interest cost instantly.

Calculate Car Battery CCA Needs Find the exact CCA your car battery needs by engine size & fuel type. Avoid no-starts in winter with SAE J537-based recommendations.

Calculate Your Car's Annual Depreciation & Residual Value Calculate your car's annual depreciation and residual value. See year-by-year value loss with our free, fast calculator.

Torque Unit Converter: Nm, lb·ft, and kg·m Free torque converter. Instantly convert Newton-meters (Nm), foot-pounds (lb-ft), and kilogram-meters (kg-m) with NIST-exact factors for any spec.

Calculate Travel Time with Stops ⏱️ Calculate real drive time including rest breaks and stops. Free, fast, and accurate trip planning.

Compare Your Annual EV vs Gas Savings Compare annual EV vs gas costs for US drivers 2026. Calculate fuel savings, federal tax credit eligibility, and total cost of ownership. Free calculator updated for IRA Section 30D.

Extra Fuel from Your Car's Air Conditioning Estimate extra fuel burned by your car's A/C per hour, day & month. Enter your MPG, daily usage hours, and fuel price for instant results.

Calculate Your Vehicle's Full Tank Range 🚗 Calculate how far you'll drive on a full tank. Instant & free fuel range estimator.

Annual GNC vs Gasoline Fuel Cost Savings Calculate annual fuel savings: gasoline vs CNG. Compare costs and see how much you could save with compressed natural gas.

Convert Speed Between km/h, mph, and Knots Convert km/h to mph, knots, and m/s instantly. Fast, free speed unit converter with real-time calculations.

Stopping Distance Calculator Calculate total stopping distance from reaction time & friction. Free stopping distance calculator with instant results.

When to Replace Your Timing Belt Timing belt replacement interval calculator. Find when to change your belt based on vehicle make. Free calculator updated for 2026.

Calculate Tire Diameter from Size Convert tire size (e.g., 205/55 R16) to actual diameter. Free tire diameter calculator with instant results.

Convert Tire Pressure Between PSI, Bar & kPa Convert tire pressure instantly: PSI ↔ Bar ↔ kPa. Free, accurate tool for proper vehicle maintenance.

Calculate Trip Fuel Cost Calculate fuel costs for any trip. Enter distance, fuel efficiency & price per liter. Instant results. Free, no sign-up required.

How to Calculate Your Truck's Payload Capacity Find your truck's real payload capacity in seconds. Enter GVWR and curb weight — instant, accurate results for safe loading.

Calculate Used Car Value by Age & Mileage Estimate your used car's current market value based on age, mileage, and original price. Free depreciation calculator.

Technology

Storage, bandwidth, battery, FPS, cloud costs.

Calculate 3D Printing Costs Per Part Calculate the real cost to 3D print a part: material, electricity, printer wear & profit margin. Free cost breakdown tool.

3D Print Time Calculator by Layer Height How long will your 3D print take? Enter model height, layer height, print speed, and layer area to get exact hours. Includes time tables for 0.1–0.3 mm layers and real speeds by printer model.

Streaming Bitrate Calculator — YouTube, Twitch & Kick Find the right bitrate for your stream in seconds. Enter your resolution and platform to get the exact Mbps recommendation and minimum upload speed needed — with a full reference table.

Calculate Battery Runtime & Device Battery Life Estimate device battery life in hours based on mAh capacity and mA consumption. Free calculator.

Big O Complexity Calculator: Algorithm Time Estimates Big O complexity calculator: compare O(1), O(log n), O(n), O(n log n), O(n²), O(2^n). Instantly estimate algorithm execution time. Free & easy.

CIDR Subnetting Calculator: Hosts, Subnet Mask & CIDR Table Enter a CIDR prefix (/24, /26, /30…) and get the subnet mask, usable hosts and a full CIDR-to-mask table. /24 = 254 hosts, mask 255.255.255.0. Free, instant, no signup.

Claude vs Gemini: Token Pricing Comparison Calculate and compare monthly API costs for Claude, Gemini, and GPT-4o by token volume. Enter your input/output token estimates and get an instant USD cost breakdown.

AWS EC2 Monthly Cost Calculator Calculate AWS EC2 on-demand monthly costs. Free pricing calculator for all instance types with 2026 rates.

Code Complexity Calculator (KLOC) Estimate project complexity and effort using KLOC. Free calculator with COCOMO model. Fast sizing metrics for software development planning.

Bytes to KB, MB, GB and TB Converter Convert bytes to KB, MB, GB and TB instantly. 1 GB = 1024 MB (binary) or 1000 MB (decimal). Free converter with a full conversion chart and the exact factors.

Calculate Your AWS EC2 Monthly Costs Free AWS EC2 monthly cost calculator. Instantly estimate your cloud instance costs with current pricing data.

Database Connection Pool Size Calculator Calculate optimal database pool size by CPU cores and load. Free, instant, updated for 2026.

Docker Image Size Calculator (by base image + dependencies) Estimate your Docker image size: pick a base (Alpine, Debian slim, Ubuntu, distroless), add dependency MB, get the total — plus a base-image size table and how to shrink it.

DPI Calculator — How Many Pixels to Print at 300 DPI How many pixels do you need to print at 300 DPI? Enter print size in cm and DPI to get the exact pixel dimensions and megapixels. Free print resolution table included.

Ethernet Cable Categories: Speed & Distance Find maximum speed and distance for Ethernet cable categories (Cat 5e to Cat 8). Free calculator with 2026 standards.

Compression Ratio Calculator Calculate your file compression ratio and space saved instantly. Enter original and compressed size to get the N:1 ratio, the % saved, and a typical-ratio table by file type.

File Download Time Calculator + Reference Table Find out exactly how long any file takes to download. Enter file size (MB/GB/TB) and internet speed (Mbps/Gbps) — instant result. Includes a full table for common file sizes at 25, 100, 500 Mbps and 1 Gbps.

FPS to ms Frame Latency Calculator (+ Smoothness Table) Convert FPS to frame latency in milliseconds: 60 FPS = 16.67 ms, 144 FPS = 6.94 ms, 240 FPS = 4.17 ms. Free calculator + full FPS-to-ms reference table and smoothness tiers.

Gaming PC Budget Calculator by FPS Target Find out how much to spend on a gaming PC in 2026. Get GPU and CPU recommendations matched to your target FPS — 60, 144, or 240 FPS — at 1080p, 1440p, or 4K.

Git Repo Size Calculator Estimate your Git repository size from commits, files, and average file size. See the working tree, the .git/ store, the total in MB, and a reference table.

GPU Rental Cost Calculator Compare GPU cloud rental vs ownership 2026: RTX 4090, A100, H100 rates on Vast.ai, RunPod & Lambda. Find your break-even month. Free online.

bcrypt Cost Factor: Time per Hash & Cracking Resistance Calculate bcrypt time per hash by cost factor (work factor / rounds). See ms per hash, hashes/sec and the OWASP-recommended cost for 2026, with a full reference table.

Appliance Electricity Cost Calculator — kWh & Monthly Bill Enter any appliance's watts, daily hours, and your rate to get exact kWh/month and dollar cost. Includes a reference table for 10 common household devices.

JPEG File Size Calculator: Quality vs File Size Estimate JPG file size from megapixels and quality (1–100). See the KB at Q60, Q75, Q85, Q90 and Q100 with a full compression table. Free, instant.

Calculate Your Monthly LLM API Costs Estimate monthly LLM API costs by token usage. Free calculator for Claude, OpenAI & more. Updated 2026.

How Much Does Midjourney Cost Per Month? Compare all four Midjourney plans for 2026: Basic $10, Standard $30, Pro $60, Mega $120. See fast GPU hours, relax mode, stealth mode, annual discount, and which plan fits your workflow.

OpenAI API Monthly Cost Calculator: GPT-4o, mini & o3 Estimate your monthly OpenAI API bill instantly. Enter model, tokens per request, and daily volume — see cost per day, Batch API 50% savings, and side-by-side comparison with Claude and Gemini.

Safe Overclocking Temperature: How Much Thermal Margin Do You Have? Is your CPU or GPU too hot to overclock? Enter your temperature under load and see how much thermal margin you have before throttling. Tjmax table by component.

Core Web Vitals Checker: Does Your Page Pass? (LCP, FID, CLS) Enter your LCP, FID and CLS and instantly see whether your page passes Google's Core Web Vitals. Official thresholds (LCP ≤2,500 ms, CLS ≤0.1, INP ≤200 ms) plus a reference table.

Calculate Password Cracking Time Free password cracking time estimator. See how long to brute-force any password based on length and character set. Updated for 2026.

PC Power Consumption Calculator Calculate total watts and recommended PSU for your gaming PC. CPU + GPU + components with 30% headroom. Free, instant. Calculate now.

RAID Capacity Calculator (RAID 0, 1, 5, 6, 10) Calculate usable capacity and fault tolerance for RAID 0, 1, 5, 6 and 10. Enter disk count and size per drive — get usable TB instantly, with a full comparison table.

RPM to RPS Converter (API Rate Limit Calculator) Convert RPM to RPS instantly (and RPH/RPD). RPS = RPM ÷ 60. Free API rate-limit calculator with a quick reference table and real provider limits.

How Much RAM Do I Need? How much RAM do you need in 2026? 8 GB for browsing, 16 GB gaming, 32 GB editing/dev, 64 GB+ for ML. Pick your use case for minimum, recommended and ideal RAM — plus a full reference chart.

PPI Calculator: Screen Pixel Density Calculate your screen's PPI (pixels per inch) from resolution and diagonal size. Check if it's Retina quality (300+ PPI), with a reference table of common phones, laptops and monitors.

SLA Uptime & Downtime Calculator How much downtime does 99.9% or 99.999% uptime allow? Convert any SLA % into minutes per year, month, week and day — with a full nines reference table.

OpenAI GPT API Monthly Cost Calculator Calculate your monthly OpenAI API bill by model (GPT-4 Turbo, GPT-4, GPT-3.5 Turbo, GPT-4o). Enter input and output token volumes to get total cost and cost per request.

DNS TTL Calculator — How Long Until Your DNS Change Propagates Enter your TTL in seconds and instantly see how long DNS propagation takes, whether your value is safe, and what to do before a migration. Includes a full reference table.

UPS Backup Time Calculator How long will your UPS last? Enter VA capacity and load in watts to estimate battery backup runtime in minutes, plus a runtime table for 650–3000 VA UPS units.

Video File Size Calculator: How Big Is Your Video? Calculate exactly how many GB a video takes from its bitrate and length. Free, instant, no sign-up — plus a quick-reference table for 1080p, 4K, ProRes and CCTV.

Choose the Best WiFi Channel: 2.4 GHz or 5 GHz Free WiFi channel selector guide. Find optimal 2.4 GHz or 5 GHz channels for your network. Fast & accurate.

Environment

Carbon footprint, recycling, water, solar energy.

Pet Carbon Footprint Calculator Find out exactly how many kg of CO₂ your dog or cat produces each year. Enter weight → get your pet's annual emissions + trees to offset. Instant, free.

How Many Trees Do You Need to Offset Your Flight's CO₂? Calculate how many trees you need to offset your flight's CO₂ emissions. Enter distance and cabin class — get the answer instantly. Includes route table and ICAO emission factors for 2026.

Calculate CO2 Savings by Unplugging Idle Chargers Calculate kWh and CO2 savings from unplugging idle chargers. Free, instant calculator for phantom load.

Email Carbon Footprint Calculator: CO₂ by Email Type Find out exactly how much CO₂ your emails produce. A plain email = 4 g CO₂; one with an attachment = 50 g. Calculate your daily and annual digital footprint instantly.

Calculate Your Appliance Energy Savings Calculate appliance upgrade savings in kWh and dollars. ENERGY STAR vs standard models, IRA tax credits, payback period — 2026 US rates.

Material Biodegradation Time: Calculator + Reference Table How long does plastic, glass, or a diaper take to biodegrade? Get instant biodegradation times for 9 common materials—backed by EPA data. Free tool + full table.

Natural Light Energy Savings Calculator Calculate kWh and dollar savings using natural light for X hours daily vs artificial. Free and fast electricity cost calculator.

How Much Paper Do You Save Printing Double-Sided? Find out how many sheets and trees you save per year by switching to duplex printing. Enter your weekly print volume and get instant results with a reference table.

Video Streaming Carbon Footprint Calculator Calculate CO₂ emissions from your streaming hours (Netflix, YouTube). See your monthly carbon footprint. Fast, free.

Wedding Carbon Footprint Calculator Calculate your wedding's total CO₂ emissions by guest count and see how many trees you need to plant to offset it. Instant, free, based on EPA benchmarks.

Electronics

Ohm's law, resistors, kWh consumption, circuits.

Speaker Impedance & Watts Per Channel Calculator Enter your amp's power, speaker impedance, speaker count, and series/parallel wiring — instantly get the total impedance your amp sees, watts per speaker, and whether the load is safe.

Refrigerator Annual Energy Consumption Calculator (kWh) Calculate your fridge's annual kWh usage and electricity cost from wattage, duty cycle, and your rate. Includes reference table for all fridge types. Free & instant.

Battery Runtime Calculator (Ah → Hours) Calculate exactly how many hours your battery will last based on capacity (Ah), voltage, load (W), and depth of discharge. Includes DoD table for lead-acid, LiFePO4, and lithium.

AWG Wire Size Chart & Calculator by Amperage What AWG wire do you need for 15, 20, or 30 amps? Get the right gauge instantly — with cross-section in mm², diameter, and the full NEC ampacity reference table.

DC Power Supply Calculator — Size Watts & Amps Correctly Enter your load (W) and voltage to get the exact amperage and wattage your DC power supply needs, with a 20–30% safety margin. Includes a reference table for 3.3V, 5V, 12V, 24V, and 48V rails.

Inductive & Capacitive Reactance Calculator: XL and XC Calculate inductive reactance XL = 2πfL and capacitive reactance XC = 1/(2πfC) for any frequency, inductance, and capacitance. Shows resonance, XL/XC ratio, and circuit behavior instantly.

Power Factor Correction Calculator — kVAR & Capacitor Calculate the capacitor bank size to correct power factor cos(φ). Enter active power, current and target cos(φ), voltage and frequency → get kVAR to compensate and µF required.

Servo PWM Angle Calculator: Pulse Width to Degrees Convert any servo PWM pulse width (ms or µs) to exact rotation angle. Standard RC: 1 ms = 0°, 1.5 ms = 90°, 2 ms = 180°. Includes reference table for 90°, 180°, and 270° servos.

Stepper Motor Steps per Revolution Calculator Calculate steps per revolution and steps per degree for any stepper motor. Enter step angle (1.8° or 0.9°) and microstepping (1/16, 1/32…) — instant result with reference table.

USB File Transfer Time Calculator Find out how long your USB file transfer will take. USB 2.0 takes ~286s/GB; USB 3.0 takes ~2.5s/GB; USB 4 takes ~0.3s/GB. Enter file size and USB version to get exact time.