English Calculators

Free Online Calculators

Accurate, private, and easy to use. No registration required.

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.

Calculate Historical Airdrop Value Track the historical value of major cryptocurrency airdrops. See what users earned from Uniswap, Arbitrum, Optimism and more.

Calculate AL30 and GD30 Bond Yields Calculate estimated annual yields for Argentine bonds AL30 and GD30. Free calculator with current pricing and IRR analysis.

Compare Trading Commissions Across Brokers Compare trading commissions across Argentine brokers—IOL, PPI, Cocos. Free calculator with 2026 rates.

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.

Calculate Your DeFi Stablecoin Lending APY Calculate estimated APY returns from stablecoin lending on Aave and Compound DeFi protocols. Free calculator updated 2026.

Rent Increase Calculator by Adjustment Frequency Compare quarterly, 4-monthly & semi-annual rent adjustments with real inflation rates. Free Argentina rental calculator.

Auto Debt-Free Certificate Cost Calculate the cost of a debt-free vehicle certificate (libre deuda) for selling your car in Argentina. Fees, requirements & 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.

Calculate Bond Modified Duration & Interest Rate Risk Bond modified duration calculator: measure price sensitivity to interest rate changes and manage portfolio risk.

Bond Present Value: Zero-Coupon & Coupon-Bearing Calculate present value of zero-coupon & coupon-bearing bonds. Determine bond discount, YTM analysis & investment decisions with our free calculator.

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 Calculate CEDEAR dividend yield with USD dividends. Free tool for Argentine stocks with real-time exchange rates updated through 2026.

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 Calculate your 15% cedular tax on investment income. Fast, accurate calculator for stocks, bonds, crypto & dividends. Updated 2026.

Personal Loan CFT Calculator Calculate the total finance cost (CFT) of a personal loan including APR, VAT, and fees. Compare rates instantly.

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.

Calculate Your Monthly Condo Fees by Square Meter Calculate monthly condo association fees based on square footage and building amenities. Free calculator for apartment owners—get instant estimates for 2026.

How Much Will You Pay With Only Minimum Payments? Calculate the real cost of paying only the minimum on your credit card. See total interest charged and payoff timeline. Free calculator.

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 Certificate Cost & Processing Times Criminal background certificate cost in Argentina 2026. Compare standard (5 days), urgent (24h), and express (3h) delivery options.

Multi-Cryptocurrency Conversion Calculator Convert multiple cryptocurrencies to local currency instantly. Calculate Bitcoin, Ethereum, and USDT portfolio value with live rates.

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 Calculate your debt payoff using the avalanche method. Estimate total interest saved vs. snowball and compare payoff timelines across all your debts.

Debt Snowball Payoff Calculator Calculate your debt-free date using the snowball method. Enter up to 5 debts, add extra monthly cash, and see total interest saved 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.

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.

How Much Emergency Fund Should You Save? Calculate how much to save for emergencies (3-6 months of expenses). Free calculator with 2026 guidelines. No signup required.

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.

Calculate Your Ethereum Gas Fees Instantly Calculate Ethereum gas fees instantly. Find the cost of your ETH mainnet transactions, swaps, and smart contracts.

Ethereum Gas Fee Estimator Calculate Ethereum gas fees in ETH and USD. Estimate costs for transfers, ERC-20, Uniswap swaps, NFT mints, and DeFi. Compare L1 vs L2 savings.

Eviction Lawsuit: Timeline & Attorney Fees Calculate eviction timeline and attorney fees by case type. Free tool for forecasting legal costs and lawsuit duration.

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.

Calculate Your Construction Trust Installment Payments Calculate construction trust (fideicomiso) installment payments based on property value and build progress. Free tool for Argentine real estate.

FIRE Calculator: Financial Independence & Retire Early Calculate your FI number, retirement timeline & apply the 4% rule instantly. Free FIRE financial independence calculator.

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 Rates by Experience & Specialty Calculate competitive freelance rates by experience level and tech specialty. Use our free 2026 rate calculator for accurate pricing.

Perpetual Futures Funding Rate Calculator Calculate the cost of holding perpetual futures positions. Real-time funding rate estimates for crypto leverage trading.

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 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 bank interest rates and find arbitrage opportunities. Calculate potential gains across different rates instantly with our free calculator.

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 lease terms. Discover advantages, disadvantages, guarantee options & rent adjustment methods. 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.

Calculate Your Leverage Trading Liquidation Price Find your liquidation price on leveraged futures. Understand exactly where your position gets closed with our free leverage trading calculator.

Calculate the True Cost of Your Meetings Calculate how much each meeting costs your company. Find the total cost based on attendees, duration, and average salary.

Calculate Your Minimum Retirement Pension & Bonus Calculate Argentina's minimum retirement pension (ANSES) and complementary bonus for 2026. Check your total benefits 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 Calculate your refinance break-even point in months. Enter current loan, new rate, and closing costs to estimate monthly savings and total interest saved.

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.

Passive Income From Investments Calculator Calculate monthly passive income from your portfolio. Estimate yield from bonds, dividend stocks, REITs, HYSA, and T-Bills. Compare yield-only vs 4% rule…

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 Calculate profit and loss on perpetual futures positions with leverage. Free crypto P&L calculator for traders.

60/40 Crypto Portfolio Allocation Calculator Free 60/40 crypto portfolio calculator. Allocate between stocks, bonds, and cryptocurrency with our easy allocation tool.

Position Size Calculator for Stocks Position size for stocks: calculate shares to buy based on capital, risk %, and stop-loss distance. Alexander Elder's 2% rule. Updated 2026.

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 fees, provincial taxes, and required documents. Free calculator.

Rule of 72: How Long to Double Your Money Calculate how many years your capital doubles based on the annual compound rate. Rule of 72, exact formula, and time to triple or quadruple.

Lease Option & Rent-to-Own Calculator Calculate how much monthly rent credits count toward your property purchase with our free lease option calculator. Estimate total rent paid & remaining balance.

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? Calculate your rental deposit in Argentina. 1-3 months of rent required. Understand returns, deductions & legal limits. Free calculator.

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 instantly. Find minimum win rate, potential profit/loss, and verify if your trade meets professional standards. Free R:R…

Roth vs Traditional IRA Calculator Calculate and compare Roth vs Traditional IRA after-tax balances. Uses 2026 limits ($7,000 / $8,000), your tax rates, and expected return to show which account…

How Long to Double Your Savings with the Rule of 72 Free Rule of 72 calculator: Find how many years to double your savings at any interest rate. Fast, accurate, no sign-up required.

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.

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 Backtest Calculator Calculate the Sharpe ratio of your trading strategy. Evaluate risk-adjusted returns and optimize your investment performance.

Simple vs Compound Interest Calculator Calculate simple interest (I=P·r·t) vs compound interest (A=P(1+r/n)^nt). Compare totals, interest earned, and year-by-year growth. Example: $10K at 7% for 30…

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 for Tech Startups Calculate your vested stock options over 4 years. Free equity calculator for tech startup employees.

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.

Calculate IRR and NPV for Investment Projects Evaluate investments with IRR, NPV, and payback analysis. Compare against opportunity cost—savings accounts, bonds, WACC. Make better investment decisions.

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 Calculate the cost of changing your car registration to another province in Argentina. Fast, free, updated for 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 your USD broker investment returns & yields instantly. Free, no registration needed. Updated for 2026.

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.

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 for Yield Farming Calculate impermanent loss when providing liquidity to DeFi pools. Free calculator for yield farming analysis.

Health

BMI, calories, body fat, pregnancy, fitness.

Convert HbA1c to Average Glucose (eAG) Convert HbA1c to estimated average glucose (eAG). Track blood sugar levels and diabetes risk with our free calculator.

Abdominal Circumference and Cardiovascular Risk Men >102cm | Women >88cm = high metabolic risk. Check your abdominal circumference & cardiovascular health for free.

Calculate Your Daily Added Sugar Intake Calculate your daily added sugar intake. WHO recommends max 50g/day (10% calories), ideal 25g. Free instant calculator.

How Much Sleep Do Adults Need by Age? Adults 18-64 need 7-9 hours of sleep daily. Ages 65+ need 7-8 hours. Fast, free calculator with age-based recommendations.

Calories in Beer, Wine & Spirits Calculate calories in beer, wine, fernet, gin instantly. Free tool for fitness and diet tracking.

AMH & Ovarian Reserve Interpretation Understand your AMH levels and ovarian reserve by age. Free fertility calculator with clinical reference values.

Find Baby Names by Meaning & Popularity Enter a baby name to discover its meaning, origin & popularity in Argentina. Search thousands of girl and boy names. Find perfect baby names.

Baby Shoe Size Calculator Calculate your baby's shoe size using age or foot measurement. Get instant conversions between Argentine, European, and US sizes.

How Much Sleep Does Your Baby Need by Age? Discover how many hours your baby needs to sleep at each age, plus recommended naps and wake windows. Get personalized sleep guidance based on NSF & AAP…

When Do Baby Teeth Come In? Complete Timeline When do baby teeth erupt? Track your baby's teething timeline from 6-33 months. See the order teeth come in, symptoms, and when to start dental care.

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 Estimate your BAC by drink type, weight & time using Widmark formula. Free blood alcohol calculator. Check if it's safe to drive.

Blood Oxygen Saturation (SpO2) Calculator by Altitude Calculate normal SpO2 blood oxygen saturation levels by altitude. Reference ranges for sea level to high elevation.

Normal Blood Oxygen Saturation (SpO2) Levels Blood oxygen saturation (SpO2) explained. Normal: 95-100%. Low: 90-94%. Critical: <90% seek urgent care. Free calculator.

Blood Pressure: Normal Ranges & Hypertension Classification Check blood pressure against medical standards. Normal <120/80, Elevated 120-129/80, Stage 1 130-139/80-89. Instant calculator & reference guide.

Blood Pressure WHO Classification Calculator WHO blood pressure classification calculator. Check your reading against current WHO/AHA guidelines and understand your cardiovascular risk category.

BMI Calculator for Seniors Age 65+ Free BMI calculator for seniors 65+. Healthy range is 22-27 (different from younger adults). Calculate instantly online.

Basal Metabolic Rate (BMR) Calculator Calculate your basal metabolic rate using the Harris-Benedict formula. Free online BMR calculator to estimate daily calories burned at rest.

BMR Calculator (Mifflin-St Jeor) Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation. Estimate daily calorie needs by activity level. Results in kcal for men and women.

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.

Fat Mass vs Lean Mass Calculate your body fat percentage, lean mass, and composition. Instant health metrics based on proven formulas.

Body Fat % Calculator (Jackson-Pollock) Calculate body fat percentage from skinfold calipers using the Jackson-Pollock 3-site method. Get body density, fat mass, lean mass, and classification.

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.

Breast Milk Production Calculator 🩺 Breast pump calculator: estimate your breast milk production by baby age, pumping frequency & pump type — free & instant.

How Many Extra Calories Do You Need While Breastfeeding? Estimate extra calories needed while nursing based on nursing type and activity. Free lactation nutrition calculator for postpartum weight management.

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

Safe Caffeine Dosage by Weight Calculate your safe daily caffeine limit based on body weight. FDA guidelines, pregnancy considerations & personalized recommendations.

Daily Calcium Requirements by Life Stage Calculate daily calcium needs by age and life stage. Adults: 1000mg, women 50+ and men 70+: 1200mg/day. Free & instant.

Ideal Body Weight Calculator (Women) Calculate ideal body weight for women using Devine, Robinson, and Hamwi formulas. Compare results by height, frame size, and age.

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.

How Many Calories Do Household Chores Burn? Calculate calories burned cleaning, cooking, and gardening by weight and duration. Accurate MET data from Ainsworth's Physical Activity Compendium.

Gluten-Free & Celiac-Safe Foods Guide Check which foods contain gluten (TACC) and find safe alternatives. See ppm levels and discover gluten-free options for celiac diet.

Child BMI Calculator with WHO Percentiles Calculate your child's BMI and percentile using WHO growth charts. Free pediatric BMI calculator for kids ages 2-18 with age & sex adjusted percentiles.

Predict Your Child's Adult Height Using Parental Height Use the Tanner formula to estimate your child's adult height based on parental height. Free calculator with ±8.5 cm accuracy. Includes growth range.

Heimlich Maneuver by Age Learn the correct Heimlich maneuver by age. Free emergency first aid guide for choking situations — 2026.

Total Cholesterol, LDL & HDL Calculator Free cholesterol calculator. Check healthy ranges: Total <200, LDL <100, HDL >60 (men >40, women >50). Instant results.

Does Coffee Dehydrate? The Real Facts About Caffeine and Hydration Discover if coffee actually dehydrates you. Free calculator to analyze caffeine, hydration myths, and real effects. Updated 2026.

CPR Chest Compressions: Rate & Depth Guidelines Learn proper CPR chest compression rates and depths for adults, children, and infants using 2020 AHA guidelines. Quick reference.

Creatine Dosage by Body Weight Free creatine dosage calculator. Calculate loading and maintenance doses by body weight. Science-backed recommendations in seconds.

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

Safe Daily Caffeine Intake Limits 400mg max daily for healthy adults = 4 cups of coffee or 8 espressos. Free caffeine calculator—find your safe limit now.

Daily Calcium Requirements by Age and Gender 🩺 Calculate daily calcium needs by age and gender to prevent osteoporosis. Get personalized RDA recommendations.

Calculate Your Daily Fiber Intake Calculate your daily fiber needs by age & gender. Free fiber intake calculator with recommendations: 38g for men, 25g for women, 20–30g for kids.

Daily Iron Requirements by Sex & Age Men need 8mg, women 18mg, pregnant women 27mg daily. Free calculator to determine your iron requirements by age.

Daily Protein Intake Calculator Calculate your daily protein needs in grams by weight, goal, and age. Based on RDA 0.8 g/kg up to 2.4 g/kg for muscle gain or cutting.

Daily Sodium Intake Limits & Safety 🩺 Max 2,300mg sodium daily (WHO). Hypertension: 1,500mg. Free sodium intake calculator for safe daily limits.

Daily Steps: 10,000 or Variable Calculate your daily steps. WHO recommends 7,000-10,000 steps for optimal health. Free, simple & quick calculator.

Daily Water Intake Calculator Calculate your daily water needs by weight. Base: 35 ml/kg. Adjust for exercise, climate, pregnancy, and lactation. Results in liters, oz, and cups.

Daily Water Intake Calculator 🩺 Check if you're drinking enough water daily. Get personalized assessment based on weight, activity level, and climate. Take the quiz now.

Calculate Your Daily Water Intake Calculate personalized daily water intake based on your weight, activity level, and climate. Get instant hydration recommendations.

Daily Sodium Maximum on the DASH Diet 🩺 Calculate your daily sodium limit on the DASH hypertension diet. Free calculator, instant results, no signup.

Mediterranean Diet Adherence Score Test your Mediterranean diet adherence with this science-backed 14-point PREDIMED scoring system. Get your score and personalized recommendations.

Athlete Electrolyte & Fluid Replacement 💧 Calculate electrolyte needs during long-distance exercise. Free sodium, potassium, and fluid intake calculator for athletes.

Pregnancy Due Date Calculator (EDD by LMP) 👶 Free pregnancy calculator — enter your LMP and get your estimated due date (EDD), current gestational week, trimester, and weekly milestones. Week-by-week tra

Embryo Implantation Window Calculator Calculate embryo implantation timing: Enter ovulation or transfer date to predict when implantation occurs and first pregnancy symptoms appear.

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

Estrogen & Progesterone Levels by Menstrual Cycle Phase Track estrogen and progesterone levels across your menstrual cycle phases. See hormone fluctuations by day—free calculator with reference ranges.

What Are Normal Fasting Blood Glucose Levels? Normal <100 mg/dL. Prediabetes 100-125. Diabetes ≥126. Free fasting glucose calculator with reference ranges updated for 2026.

Flexitarian Diet Weekly Macros & Meal Plan Calculator Flexitarian diet macro calculator. 20% protein, 30% fat, 50% carbs. 5 plant-based + 2 meat days. Free meal planning & carbon footprint tracking.

FODMAP Foods Guide Discover which foods are high and low in FODMAP. Find alternatives for IBS symptom management.

Food Digestion Times by Type Water 20 min, fruits 30-60 min, carbs 2-3 hrs, meat 4-5 hrs. Free digestion calculator.

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 Satiety index for 24+ foods (Holt 1995). White bread = 100. Values >150 = high satiety. Choose high SI foods to stay full longer between meals.

FSH & LH Levels: Menopause vs. Perimenopause Check your FSH and LH hormone levels during menopause and perimenopause. Free calculator with reference ranges and interpretation.

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.

Calculate Your GFR: Glomerular Filtration Rate Calculate your GFR with CKD-EPI 2021 formula. Assess kidney function from serum creatinine, age & sex. Clinical reference calculator.

Glycemic Index and Load Calculator by Food Portion Calculate the glycemic index (GI) and load (GL) of foods. Free, science-backed tool for blood sugar impact and diet planning.

Calculate Your Meal's Glycemic Load Glycemic load = GI × carbs ÷ 100. Measure real blood sugar impact per serving. GL < 10 is low, 11–19 medium, ≥20 high. Free calculator.

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.

Calculate Your Healthy Caloric Deficit Calculate a healthy caloric deficit for sustainable weight loss. Find your daily calorie reduction to reach your goal weight safely.

Healthy 150-300 Calorie Snacks Find healthy 150-300 calorie snack ideas. Free, fast calculator with science-backed nutrition guidelines for 2026.

Hemoglobin A1c (HbA1c) Diabetes Calculator A1c diabetes calculator: Check your hemoglobin levels. Normal <5.7%, Prediabetes 5.7-6.4%, Diabetes ≥6.5%.

Daily Hydration in Hot Climates Hydration calculator for hot weather: Calculate daily water needs based on temperature, exercise, and body weight. Complete guide for 2026.

Lorentz & Devine Ideal Weight Formula Calculator Calculate your ideal weight using Lorentz or Devine formulas. Accurate, fast, and free. Get personalized results based on height and age.

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.

16/8 Intermittent Fasting: How to Split Your Calories How to distribute calories for 16/8 intermittent fasting. Free calculator with science-backed guidelines and macronutrient distribution tips.

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.

Iron, Ferritin & Anemia Reference Guide Check your iron and ferritin levels by age and sex. Reference ranges for hemoglobin and iron storage to assess anemia risk.

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 Calculator Calculate lean body mass using the Boer formula. Enter sex, weight, and height to get LBM in kg/lb, fat mass, and % lean mass instantly.

16:8 Intermittent Fasting Macro Calculator Calculate daily macros for 16:8 intermittent fasting: 30% protein, 30% fat, 40% carbs over 2 meals. Free, instant results.

Atkins Diet Macros by Phase Calculate Atkins macros for all 4 phases: Induction (20g), Active Loss (25–50g), Pre-Maintenance (50–80g), Maintenance (80–100g carbs). Free, instant.

Carnivore Macros Calculator Calculate your carnivore diet macros: 30% protein, 70% fat. Daily meal breakdown for beef, fish, eggs & butter. Zero-carb nutrition guide.

Macros Calculator (Cutting / Bulking) Calculate your daily protein, carbs, and fat targets for cutting or bulking. Enter TDEE or BMR + activity level, set your goal, and get exact macro grams in…

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 Macros Calculator: Flexible Diet Approach Calculate your IIFYM macros for flexible dieting: 30% protein, 30% fat, 40% carbs. 80/20 rule: 80% nutritious, 20% flexible. Free calculator.

Low-FODMAP Macros Calculator for IBS & SIBO Low-FODMAP macros: 20% protein, 30% fat, 50% low-FODMAP carbs. For IBS and SIBO with 70% symptom improvement. Monash protocol.

Mediterranean Diet Macro Calculator: 15-35-50 Split Mediterranean diet macros: 15% protein, 35% fat (olive oil & fish), 50% carbs. PREDIMED-proven. Reduce cardiovascular risk by 30%. Free.

Calculate Your Macros for Recomposition, Cutting, and Bulking Calculate daily macros for recomposition, cutting, lean bulking, or bulking. Optimize protein, carbs, and fat distribution based on your fitness goals.

Daily Magnesium Dosage by Age and Gender Calculate your daily magnesium dosage by age and gender. Updated 2026 guidelines for optimal health and deficiency prevention.

Calculate Your Daily Magnesium Needs Calculate your daily magnesium intake (RDA: 310–420mg). Improves sleep, reduces muscle cramps & migraines. Food sources and supplement guide.

How Does Your Age Affect Male Fertility and Sperm Quality? Male age affects sperm quality & fertility. Discover conception timelines, genetic risks & detailed insights with this science-backed calculator.

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. Fast, free, and instant.

Mediterranean Diet Weekly Meal Plan Free Mediterranean diet plan 1500–2500 kcal. Build balanced weekly menus with macronutrient guidance.

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.

Daily Omega-3 DHA+EPA Dosage Calculator Calculate your daily Omega-3 DHA+EPA intake (250-500mg recommended by AHA). Free & instant.

One-Rep Max Calculator (Epley/Brzycki) Calculate your estimated 1RM using Epley, Brzycki, and Lombardi formulas. Enter weight and reps to get max strength and a full training percentage table.

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.

Healthy Weight Calculator for Children by Age and Sex Calculate healthy weight for your child by age & sex using official WHO growth standards. Free calculator with percentile ranges.

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 Calculator Calculate realistic postpartum weight loss timeline. Enter your pre-pregnancy weight, current weight, and breastfeeding status. Free & fast.

Optimal Pilates Reformer Frequency Discover ideal pilates frequency for your goals. Get personalized weekly recommendations for toning, posture, and recovery.

Postpartum Depression Screening: Take the Edinburgh Scale Take the EPDS screening test (10 questions) to assess your risk of postpartum depression. Free, evidence-based tool used by healthcare providers.

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.

Daily Probiotic CFU Dosage Calculator Calculate daily probiotic dosage: Adults 1-10 trillion CFU, babies 1-5 trillion. Strain-specific. Free & fast.

Find Your Perfect Ring Size Find your perfect ring size in seconds. Measure your finger and convert to US, UK, or EU sizes instantly. Free calculator with size chart.

RPE & RIR Training Calculator Calculate RPE, RIR, and estimated 1RM percentage for strength training workouts. Free autoregulation tool.

Daily Sodium Maximum Calculator for Hypertension Calculate your daily sodium limit based on blood pressure. WHO <2000mg, AHA <1500mg. Discover hidden sodium sources and lower blood pressure naturally.

WHO Spermiogram Reference Values Check spermiogram results against WHO 2021 criteria. Free semen analysis calculator with instant reference values.

SPF Sun Protection Calculator Calculate sunscreen protection time by SPF level and skin type. Find reapplication timing and UV protection guides.

Calculate Optimal Hydration & Electrolyte Intake for Exercise Calculate your ideal hydration: 500-1000ml/h with 400-800mg sodium for exercise. Free, fast calculator updated 2026.

Subcutaneous vs Visceral Fat: Understanding the Difference Understand subcutaneous vs visceral fat. Learn the difference between under-skin fat and dangerous abdominal fat. Free calculator.

Calculate Your Body Surface Area (BSA) – Du Bois, Mosteller & Haycock Body surface area (BSA) calculator using Du Bois, Mosteller & Haycock formulas. Calculate BSA for chemotherapy dosing, cardiac index & medical applications.

Best Supplements for Gym Beginners Learn which supplements to take when starting the gym. Free, fast calculator with science-backed recommendations. Updated 2026.

Target Heart Rate Zones Calculator Calculate your 5 heart rate training zones using the Karvonen method. Enter age and resting HR to get precise bpm ranges for fat burn, aerobic, threshold, and…

Mifflin-St Jeor TDEE Calculator Calculate your daily calorie needs with the Mifflin-St Jeor TDEE formula. Free, accurate calculator updated for 2026.

Testosterone Levels by Age for Men 🩺 Check normal testosterone ranges for your age. Updated reference values for men's health in 2026.

Triglyceride Levels: Normal, High & Very High Check if your triglyceride levels are healthy. Normal <150, high 200-499, very high ≥500 mg/dL. Free calculator.

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

Vegan Macros & Plant-Based Protein Daily Guide Calculate daily macros for vegan diets. Plant-based protein tracking, macro distribution & nutrition planning. Free vegan macro calculator.

B12 Dosage for Vegans Find the right B12 dosage for vegans. Get personalized daily, weekly, or monthly supplement recommendations based on current guidelines.

Vitamin D Daily Dosage & Sun Exposure Calculator Calculate your daily vitamin D needs: 600-800 IU by age. Get your optimal sun exposure time. Free, instant results.

Vegan B12 Supplement Dosage Calculator 🩺 Vegan B12 calculator: find your dose—250 mcg daily or 2000 mcg weekly. Required for vegans. Free.

VO2 Max Estimator (Cooper 12-Min Run Test) Calculate your VO2 max from the Cooper 12-minute run. Enter distance in miles or meters, sex, and age to get ml/kg/min and fitness category.

Waist-to-Hip Ratio Calculator Calculate your waist-to-hip ratio: Men >0.90 & women >0.85 = high cardiovascular risk. Free, instant results.

Weekly Training Volume for Muscle Hypertrophy Calculate optimal weekly sets per muscle group for hypertrophy using Schoenfeld's evidence-based guidelines.

Break Through a Weight Loss Plateau Learn proven strategies to break weight loss plateaus: refeed days, cardio adjustments, and metabolic reset techniques for sustainable fat loss.

When Is My Baby Due? 🤰 When is my baby due — free calculator. Enter your LMP (or conception / transfer date for IVF) and see your estimated due date, plus answers for irregular…

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 Determine daily whey protein scoops based on your protein needs. Fast, free calculator with science-backed guidance.

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

Calories Burned in Yoga by Style Calculate calories burned during yoga. Free calculator for hatha, vinyasa, ashtanga, bikram & yin styles based on weight & duration.

Daily Zinc Requirement Calculator 🩺 Zinc RDA: 11mg men, 8mg women. Critical for immunity, testosterone, wound healing. Free & instant.

Zinc Dosage by Age and Gender Calculate your daily zinc dosage based on age and gender. Get personalized recommendations for immune health and wellness.

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 differences between values. With formula and step-by-step explanation. 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 $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 Estimator Estimate your deadlift one-rep max using the Epley formula. Free, fast, and accurate.

Back Squat 1-Rep Max Estimator Free 1RM back squat calculator using Epley formula. Quickly estimate your max lift for strength training.

21K Half Marathon Training Plan 21K Half Marathon Training Plan by Level | Free Calculator. Discover weeks needed based on fitness. Beginner to advanced.

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.

How Many Calories Do You Burn Boxing? Calculate calories burned during boxing workouts by weight, session type, and duration. Free, accurate 2026 boxing fitness calculator.

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 by Style and Time Swimming calories: calculate kcal burned swimming crawl, breaststroke, backstroke, or butterfly based on weight and duration. With official swimming MET table.

Calculate Your Ideal Caloric Surplus for Building Muscle Calculate your ideal caloric surplus for muscle gain without excess fat. Based on TDEE and experience level · Free, fast & accurate

How Many Carbohydrates Do You Need During Exercise? Calculate carbohydrate needs by duration and intensity. Get personalized recommendations based on ACSM guidelines for runners, cyclists, and endurance…

Calculate Your Critical Power (CP) Determine your critical power (CP) and anaerobic capacity (W') from two time trials. Free, instant, and scientifically accurate.

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.

How Many Energy Gels for Your Race Calculate how many energy gels (30g) you need per hour during a race. Free endurance running calculator with carb absorption guidance.

Cycling FTP Calculator: 20-Minute Test 🚴 Calculate your cycling FTP instantly using the 20-minute test protocol. Free, accurate, and no signup required.

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.

Estimate Your Half Marathon Time from a 10K Predict your half marathon finish time based on your 10K pace. Free, fast, and uses proven race prediction formulas.

Heart Rate Training Zones (5 Karvonen Zones) Calculate your 5 heart rate training zones using the Karvonen method. Free calculator based on max HR and resting heart rate.

How Much Water Should You Drink During Exercise? How much water to drink during exercise? Free hydration calculator based on your weight, intensity, and weather. Includes electrolyte recommendations.

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 Find your ideal marathon pace per km for any goal finish time. Free pace calculator for runners training for races.

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.

How Long Should Muscles Rest Between Workouts Calculate how many hours of rest you need between same muscle group workouts. Free muscle recovery calculator based on intensity, age & sleep.

How Much Protein Should You Eat Per Meal? Calculate optimal protein per meal for maximum muscle synthesis. Evidence-based recommendations for building muscle. Free & fast.

Calculate Your Marathon Pace by Goal Time Convert your marathon goal time to pace (min/km). Free calculator for runners training for a marathon.

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.

Calculate Your Padel Ranking Points Find exactly how many points you need to advance in APT/AAP padel rankings. Free calculator with 2026 requirements updated monthly.

Calculate Your Ideal Competition Weight by Sport and Height Calculate your ideal competition weight by sport, height, and gender. Based on elite athlete data. Free, fast, and accurate. Start now! 🏆

Post-Marathon Rest Days Calculator Calculate your post-marathon recovery timeline using the proven 1-day-per-km rule. Find out how many rest days you need after your marathon.

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 Handicap Points & Relegation Risk Calculate your rugby team's average points per match and relegation risk. Free 2026 calculator with real scoring rules.

The 10% Rule for Running Weekly Progression Calculate safe weekly running progression with the 10% rule. Prevent injuries while building fitness. Free & fast.

Calculate Your 100m Swimming Pace Swim pace calculator: find your pace per 100m from any distance and time. Free, fast, and accurate results.

Calculate Your Swimming Pace Per 100 Meters Calculate your swimming pace per 100 meters based on distance and time. Get pace equivalents for 400m, 1500m, and open water. Free calculator.

Swimming 100m Pace Calculator Calculate your swimming pace per 100m based on your target time. Free calculator for swimmers and coaches.

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 Calculate your adjusted pace for elevation gain in trail running. Free calculator with formula for uphill and downhill adjustments.

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 Often Should You Train Each Muscle Group? Calculate optimal weekly training frequency by muscle group based on your level and goals. Free calculator with instant results.

Calculate Your Weekly Training Volume by Muscle Group Find your optimal weekly training volume (MEV/MRV) by muscle group and fitness level. Free, fast & based on Israetel's framework.

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.

Hotel Cost Split Calculator Calculate how to split a hotel bill across travelers and nights. Handle uneven stays, early checkouts, and custom splits in seconds.

Road Trip Time Calculator Calculate drive time, total trip time with breaks, and ETA for any road trip. Enter distance, speed, and departure time to get your arrival estimate.

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 exact AC cooling capacity for your room. 600–800 BTU/m² based on sun & insulation. Fast, free tool.

Calculate aluminum profile linear meters for windows and doors Calculate linear meters of aluminum profile for windows and doors. Free calculator for DIY and construction projects.

Baseboard Trim — Linear Meters 🔨 Free baseboard calculator — instantly calculate linear meters of trim needed by room size.

Calculate Boiler Size by Room Area & Insulation Calculate boiler power needed by room size and insulation quality. Instant heating capacity sizing. Free heating system calculator.

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 Calculate bricks needed per m² of wall. Standard 6×12×24 brick = 67 units/m² with common bond. Free and instant.

Boiler Heating Power Calculator by Room Size Calculate boiler power (kW) needed for your room. Standard 100W/m² heating rule. Free, fast & accurate.

Ceramic Tile Adhesive Calculator Calculate ceramic tile adhesive bags needed for your project. 25kg covers ~5m² · Fast & free.

How Many Boxes of Tiles Do You Need? Tile calculator: ceramic & porcelain. Calculate boxes, m², adhesive & grout. Accounts for waste. All tile sizes. Free tool.

Ceramic Tile Grout Calculator Calculate ceramic tile grout needed: 0.5–0.8 kg/m² based on joint size. Free, fast, and accurate.

Calculate Ceramic Tile Boxes by m² + Waste Factor Calculate ceramic tile boxes needed per m² with 10% waste factor included. Free & instant calculator. Get exact quantities for your project.

Concrete Beam Sizing Calculator Calculate concrete beam height and width based on free span. Quick, free, and accurate sizing for your construction project.

Concrete Recipe & Mix Ratio Calculator 🔨 Concrete 1:3:3 ratio: 7 bags cement + 0.5m³ sand + 0.5m³ gravel. Free calculator.

Calculate Concrete Volume for Continuous Footings Calculate concrete volume for continuous footings using length, width, and depth. Free material estimates with cement bag conversions.

How Much Curtain Fabric Do You Need? Calculate how much fabric you need for curtains. 2x window width + length + 10cm hem. Free, fast & instant results.

Deck Boards & Patio Materials Estimator Calculate deck boards, fasteners, and spacing needed for your patio project. Free DIY tool for accurate material estimation.

Door Hinge and Screw Calculator Calculate hinges and screws needed for interior and exterior doors. 3 hinges per door, 6-8 screws per hinge. Free DIY hardware estimator.

Drain Trap Grate Size by Fixture Type What size drain grate do you need? Find correct diameter for sinks, kitchens, showers & patios. Free building code guide.

Calculate Correct Electrical Cable Size by Amperage Calculate correct electrical wire gauge and cable size based on amperage and distance. Avoid voltage drop with our free calculator.

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 & Varnish Coverage Calculator Calculate furniture paint coverage: 1L covers 8-10m² with 2 coats. Free calculator for any piece. Quick & accurate.

How Much Soil Does Your Garden Bed Need? Calculate garden soil volume instantly. Enter your bed dimensions and desired depth to get the exact cubic meters you need. Free, accurate, and private.

How Much Grass Seed per Square Meter? Calculate grass seed per m² for new lawns and reseeding. Free instant calculator with accurate seed amounts.

Isolated Footing Pad Sizing by Column Load Free isolated footing pad calculator. Size foundations by column load and soil bearing capacity. Instant results.

Melamine Board Cutting Calculator Calculate melamine board cuts & optimize piece layout for 2.60×1.83m plates. Free cutting calculator for DIY & construction projects.

Asphalt Membrane Rolls Calculator Calculate how many asphalt membrane rolls you need. Free calculator—1 roll covers 10 m². Get instant results for your waterproofing project.

How Much Paint Do You Need for Your Room? Calculate exactly how much paint (in liters) you need to paint a room. Automatically deduct doors and windows. Includes paint type, coats, and bucket sizes.

Calculate Paint Needed for Your Walls Free paint coverage calculator. Find out how many liters you need per m². Standard coverage: 1L covers 10-12 m² per coat. Quick & accurate.

Calculate Paint Needed: How Many Liters Do You Need? Calculate exactly how much paint you need in liters. Input area, coverage rate & coats for instant estimates.

Calculate Perimeter Fence Materials & Cost Calculate bricks, cement & sand needed for perimeter fences. Free, fast calculator for 2026 material estimates.

Calculate Roof Waterproofing Sealant kg/m² Calculate liquid or acrylic roof waterproofing kg/m² based on area and thickness. Fast, free estimates for your roofing project.

Mortar Calculator for Rough Plaster Coating Rough plaster mortar calculator — Enter wall area and thickness for instant results. Free, accurate, no sign-up needed.

Solar Panel kW System for Your Home Calculate the right solar panel system (kW) for your home based on monthly energy consumption. Free, accurate sizing tool.

How Much BTU for Split AC by Room Size? Calculate exact BTU needed for split AC units based on room size and climate. Free, fast, and accurate cooling sizing.

Stairs — Blondel's Rule Calculate optimal stair dimensions using Blondel's Rule (62-64 cm). Find perfect tread and riser measurements free.

Calculate Steel per m² of Slab Calculate steel reinforcement per m² of slab by type. Free calculator for all slab types. Get exact requirements.

Calculate Minimum Thermal K-Value by Climate Zone Calculate minimum thermal K-value by climate zone per IRAM 11605. Free insulation calculator.

Calculate Tiles Needed for Square Meters Calculate how many tile boxes you need for your coverage area with 10% waste factor included. Free and instant.

Calculate Room Ventilation CFM Free CFM calculator for bathrooms, kitchens & rooms. Size exhaust fans and calculate ventilation needs based on air changes per hour. Instant results.

Calculate Your Ideal Water Heater Tank Size Calculate the right water heater capacity: 50L for 2 people, 80L for 3, 120L for 4-5. Free & accurate sizing guide.

Water Pipe Diameter Calculator Calculate water pipe diameter from flow rate and velocity. Free hydraulic pipe sizing tool for plumbers and contractors.

Water Pump Power & Horsepower Calculator Calculate water pump power in watts and HP based on flow rate, elevation, and efficiency. Free tool for pump sizing—no signup needed.

Calculate Water Tank Capacity by Number of People Calculate the right water tank size for your home or project. Based on residents and backup days. Free, instant results.

Cooking

Cups to grams, recipe scaling, cooking conversions.

Baker's Percentage Calculator Calculate exact ingredient weights from baker's percentages. Enter flour or total dough weight, hydration, salt, yeast, and extras to get gram-precise bread…

Calculate Whiskey Barrel Aging Time by Barrel Size Calculate how long to age whiskey in a barrel. Small barrels age 3–10× faster due to surface-to-volume ratio. Free calculator.

How Much Meat Per Person for Your BBQ How much meat per person for a BBQ? 400-600g per adult, 250g per child. Free calculator for grilling success.

Birthday Cake Servings by Size 🎂 Calculate cake servings by diameter: 20cm → 10–12, 25cm → 15–18, 30cm → 25–30. Plan your party cake instantly. Free.

How Long Does Bread Rise with Yeast? Bread dough rising calculator. Fresh yeast: ~1 hour at 75°F to double. Dried yeast slower. Free, instant results. Plan your baking times accurately.

How Many Hamburgers for Your Birthday Party 🍔 Calculate burgers for your party: 2 adults, 1-2 kids per person. Free burger quantity calculator.

Coffee to Water Ratio Calculator Calculate exact coffee and water amounts for drip, French press, AeroPress, espresso, and cold brew using SCA gold cup standards. Results in grams and oz.

Complete Vegan Protein Combinations Discover complete vegan protein combinations and amino acid pairings. Learn which plant-based foods to combine for all 9 essential amino acids.

Convert Cups to Grams for Baking 🍳 Instant cups to grams converter: flour (120g), sugar (200g), oil (220g). Free and accurate for any recipe.

Cups to Grams Converter (Baking) 🥣 Convert any number of cups to grams for flour, sugar, butter, oil, milk, honey and 17+ ingredients. Uses USDA & King Arthur densities. 1 cup flour = 120 g,…

Dry Pasta Portions Calculator Calculate dry pasta portions: 80g appetizer, 100-120g main per person. Fast & free.

Egg Size & Weight Equivalents Convert eggs by size to grams instantly. S: 45g, M: 55g, L: 65g, XL: 75g. Calculate egg white (60% of weight). Free calculator.

How Many Empanadas Per Guest for Your Event? Calculate empanadas per guest: 3-4 as appetizer, 5-6 as main course. Free, instant party planning calculator.

How Much Ground Coffee Per Cup? Calculate ground coffee amounts for espresso, drip, and French press. Fast, free brewing ratio calculator with standard measurements.

How Much Chocolate Do You Need for Homemade Bonbons? Calculate tempered chocolate needed for homemade bonbons. Exact amounts for 40+ molded truffles. Free calculator.

Calculate Pizza Dough Amounts by Number of Guests 🍕 Homemade pizza dough: 250g flour for medium pizza. Scale by number of guests · Free & fast.

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 for Your Party Calculate ice needed for your party: 1kg per guest. Works for drinks, display & presentation. Free, quick, accurate.

Calculate Your 16/8 Intermittent Fasting Schedule Plan your 16/8 intermittent fasting schedule. Calculate eating windows, fasting hours, and break-fast times instantly.

Calculate Your Keto Macros Calculate your ketogenic diet macros based on your goals — protein, fat, and carbs breakdown.

Oven Temperature Conversion Calculator Convert oven temperatures between °F, °C, and Gas Mark instantly. Includes convection adjustment of 25°F (15°C). Reference table for 250°F to 500°F.

Convert Oven Temperatures: Gas, Electric & Fahrenheit Convert oven temperatures instantly: 180°C = gas mark 4 = 350°F. Easy conversions between gas, electric, and Fahrenheit. Free calculator.

Party Beverage Calculator Estimate beverages for your event: 3-4 drinks first hour, 2-3 after. Beer, wine & soda mix. Free party planning tool.

How Many Pizzas Do You Need? Calculate how many pizzas you need for your party. 3 slices per person = 1 large pizza for 3-4 guests. Free and fast.

Sushi Per Person Calculate sushi portions easily: 10-12 pieces or 2-3 rolls per person. Free online calculator—instant results, no signup needed.

Priming Sugar for Home Beer Carbonation Calculate grams of sugar to carbonate your homebrew beer based on CO₂ volumes and temperature. 6–8 g/L dextrose for standard beers. Free calculator.

Recipe Scaling Calculator Calculate scaled ingredient amounts instantly. Enter original servings, target servings, and up to 10 ingredients. Smart unit conversion included.

Calculate Rice Portions: Grams Per Person Calculate how many grams of rice to cook per person based on meal type. Includes water ratios. Perfect for risotto, paella, sushi, and rice bowls.

Rice Portions Per Person Calculate rice portions per person: 60-80g side dish, 100g main course. Fast & free calculator.

Vanilla Pound Cake Recipe Scaler Easily scale your vanilla pound cake recipe for more or fewer servings. Use exact ingredient ratios to adjust portions. Free & instant calculator.

Calculate Your Beer's SRM Color with the Morey Formula Calculate beer color SRM with the Morey formula. Enter malt weight, lovibond degrees, and final volume. Pale Ale 5-10 SRM, IPA 6-14, Stout 30+ SRM.

Cups, Tablespoons & Grams Converter for Recipes Convert cups, tablespoons, and teaspoons to grams and back for 30+ ingredients. Flour, sugar, butter, honey, cream, rice, and more. Free cooking converter.

Teaspoon to Grams Converter for Spices Convert teaspoons to grams for salt, sugar & spices. 1 tsp salt = 6g, sugar = 4g, pepper = 2g. Free online calculator.

Vegetable Cooking Times 🍳 Broccoli 4 min steamed, potato 20 min boiled, carrots 15 min · Free and instant.

How long to infuse vodka with fruits & spices Calculate optimal vodka infusion time for fruits, herbs & spices. DIY limoncello: citrus 3–5 days, berries 2–4 days, spices 2–4 weeks.

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 Calculate your cat's age in human years instantly. 1-year-old cat = 15 human years, 2 years = 24, then +4 per year. Free & fast.

Cat Vaccination Schedule: FVRCP, Rabies & Leukemia Plan your cat's vaccines: FVRCP (triple), rabies, and feline leukemia schedule. Free veterinary vaccination guide for 2026.

Cat Daily Food Portion Calculator Calculate daily cat food portions based on weight and activity. Get personalized feeding recommendations. Free, fast, and updated for 2026.

Dog Age in Human Years by Breed Convert your dog's age to human years by breed and size using the 2020 AVMA logarithmic formula. Accurate, free, instant results.

How Old Is Your Dog in Human Years? Calculate your dog's age in human years based on breed size. Accurate converter for small and large dogs. Free, instant, and accurate.

Is Your Dog Breed Apartment-Friendly? Check if your dog breed is suitable for apartment living. Evaluate based on size, energy, barking, and alone tolerance. Free apartment dog compatibility…

Calculate Your Dog's Daily Calorie Needs by Breed and Age Calculate daily calories your dog needs by breed, weight, age & activity. Uses veterinary MER formula. Free & instant.

How Much Dog Food Should You Feed Your Dog? Calculate daily dog food portions by weight. Get feeding recommendations for adult and senior dogs based on their weight. Free tool.

Dog Shedding & Brushing Schedule by Season Calculate weekly brushing frequency by dog breed and season. Free dog shedding guide for all breeds.

Dog Vaccine Calendar for Puppies & Adults Free dog vaccination schedule calculator. Track puppy and adult vaccines, rabies, and core shots with our 2026 guide.

Dog Walking Minutes by Breed Calculate daily dog walking minutes by breed. Border Collie 90+, Bulldog 20. Free calculator, updated 2026.

Ideal Age to Spay Female Dogs and Cats Find the ideal age to spay your female dog or cat. Learn about heat cycles, timing, and veterinary recommendations. Free calculator.

Fish Tank Water Calculator Calculate tank size for your fish. Rule: 1cm adult fish needs 1L water (cichlids more). Free, fast & accurate.

Guinea Pig Vitamin C Daily Dosage Calculator Calculate daily vitamin C needs for guinea pigs. They require 10-30mg/kg/day since they can't synthesize it. Free, fast, and accurate.

Ferret Diet Protein Requirements Ferrets need 35%+ animal protein daily. Calculate your ferret's nutritional requirements by weight. Free online calculator.

Parrot & Parakeet Daily Food Distribution Calculate daily seeds, fruits & vegetables for parrots, budgies & other birds. Free, instant, species-specific feeding guide.

Calculate Your Pet's Age in Human Years Convert your dog or cat's age to human years with our free calculator. Adjust for breed and size. Updated 2026.

Calculate Pet Medication Dosage by Weight Calculate exact dog and cat medication doses in mg and ml based on pet weight, drug concentration, and frequency. Verify vet prescriptions 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.

How Old Is Your Rabbit in Human Years? Convert your rabbit's age to human years by breed (dwarf, medium, giant). Discover life stages, lifespan estimates, and care guides.

How Much to Feed Your Rabbit: Hay, Pellets & Vegetables Calculate your rabbit's daily diet with the 80/15/5 rule: 80% hay, 15% vegetables, 5% pellets. Free and instant.

Water Turtle Diet & Feeding Guide Calculate weekly food portions for aquatic turtles by weight and age. Free feeding calculator with guidelines.

Math

Average, Pythagoras, quadratic, factorial, GCD.

Solve 2x2 Systems with Cramer's Rule Solve 2x2 linear systems ax+by=e, cx+dy=f using Cramer's determinant method. Free, fast & accurate.

2x2 Matrix Determinant and Inverse Calculator Calculate 2x2 matrix determinant and inverse instantly. Free calculator, no registration needed.

Salary to Hourly Calculator Calculate your hourly rate from any annual salary. Estimate daily, weekly, biweekly, and monthly pay. Standard 2,080-hour work year (40 hrs × 52 weeks).

Circle Area, Perimeter, and Sector Calculator Circle area calculator: compute area, perimeter, sector area, and arc length of a circle from radius and angle. With formulas and explanation.

Circle Area and Perimeter Calculate the area (πr²) and circumference of any circle instantly. Free tool with step-by-step formulas.

Arithmetic Progression Calculator Calculate the nth term and sum of an arithmetic sequence. Free, fast, and accurate arithmetic progression calculator.

Convert Between Binary, Decimal, and Hexadecimal Instantly convert between binary, decimal, and hexadecimal numbers. Free online base converter for computer science. No signup required.

Binomial Probability Calculator Calculate P(X=k) for binomial distributions. Find probability, mean, and variance for n trials with probability p.

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.

C(n,k) Combinations Calculator Calculate combinations C(n,k): ways to choose k items from n without order. Free, fast, and accurate calculations.

Calculate Cone Volume & Surface Area Calculate cone volume and surface area instantly. Free, fast, and accurate. Perfect for students and professionals.

Convert BTU to Kilocalories for Air Conditioning Instantly convert BTU to kcal for AC sizing. Free online calculator with accurate conversions for HVAC professionals and homeowners.

Convert Temperature: Celsius, Fahrenheit & Kelvin Convert between Celsius, Fahrenheit, and Kelvin instantly. Free temperature converter with no signup required.

Convert Between Degrees, Radians & Gradians Convert between degrees, radians, and gradians instantly. Free online angle unit conversion calculator.

Convert Fahrenheit to Celsius Convert Fahrenheit to Celsius with our free calculator. Use the formula (°F − 32) × 5/9. Fast & accurate.

Convert Gallons to Liters (US & UK) Convert US and UK gallons to liters instantly. Free calculator: US gal × 3.785 = L; UK gal × 4.546 = L.

Convert Meters to Feet Exactly m × 3.28084 = ft. Free, fast meter to feet conversion. Accurate results in seconds.

Convert Miles to Kilometers Free miles to kilometers converter. 1 mi = 1.60934 km. Instant conversion both ways. Data updated 2026.

Ounces to Grams for Cooking Convert ounces to grams instantly: oz × 28.35 = g. Free online calculator for cooking and baking. No signup required.

PPM to mg/L Conversion (Chemistry & Water) Convert between PPM and mg/L for water quality testing. Free, accurate chemistry calculator for dissolved concentrations.

Cylinder Volume Calculator Calculate cylinder volume and surface area instantly. Free tool for radius and height. Get results in seconds.

Distance Between Two Points on a Plane Calculate the Euclidean distance between two points (x1, y1) and (x2, y2) on a 2D plane. Free and instant results.

Factorial Calculator (n!) Calculate factorials instantly. Find n! = n × (n-1) × (n-2) × ... × 1. Essential for combinatorics. Free, fast & accurate.

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.

Greatest Common Divisor & Least Common Multiple Calculate GCD and LCM of two integers instantly using the Euclidean algorithm. Free, fast, and precise.

Geometric Progression: nth Term & Partial Sum Calculate the nth term and partial sum of geometric sequences instantly. Free calculator for students and professionals.

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 two clock times. Handles overnight shifts, AM/PM, and break deductions. Results in decimal hours, HH:MM, and total…

Convert Inches to Centimeters for Screen Sizes Instantly convert inches to centimeters for screen sizes. Free tool using 1 in = 2.54 cm. Fast, accurate, no registration.

Simple Interest: Formula I = P × r × t Simple interest calculator: compute interest and final amount in seconds. Loans, short-term investments, late fees. With examples and comparison.

Convert Kilos to Pounds Accurately Convert kilograms to pounds instantly with this free calculator. Accurate kg to lbs formula for recipes, shipping, and measurements.

Logarithm Calculator for Any Base Calculate logarithms with any base instantly. Free, fast, and easy—find the exponent b that gives you x.

Mean, Median, Mode, and Range Calculator Calculate mean, median, mode, and range from any dataset. Free, fast, instant results for descriptive statistics.

Percentage Increase/Decrease Calculator Calculate the percentage increase or decrease between two numbers instantly. Formula: ((new−old)/old)×100. Works for prices, salaries, test scores, and more.

Percentage Calculator (x% of N) Calculate what x% of N equals, or find what % A is of B. Free percentage calculator with instant results.

Percentile Calculator for Your Data Calculate what percentile a value falls in within your dataset. Find quartiles and statistical rankings with detailed step-by-step results.

Permutations Calculator P(n,k) Calculate how many ways to choose k items from n where order matters. Free permutations calculator for students and professionals.

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 Calculate polynomial derivatives using the power rule. Free, fast tool for students, engineers & professionals. Supports multiple terms. No signup needed.

Polynomial Integral Calculator Calculate polynomial integrals using the power rule. Fast, free, and accurate results with step-by-step explanations.

Average, Median, Mode & Standard Deviation Calculator Calculate mean, median, mode, range, standard deviation, and variance from a set of numbers. Ideal for statistics, grades, and data analysis. Free, instant.

Quadratic Equation Solver: Roots & Discriminant Solve quadratic equations ax²+bx+c=0 instantly using the quadratic formula. Get roots and discriminant. Free calculator, no signup required.

Convert Quintals to Metric Tons Convert quintals to metric tons instantly. 1 qq = 100 kg. Free calculator for agriculture and grain trading.

Radians to Degrees Angle Converter Convert radians to degrees instantly. Free, accurate calculator using rad × 180/π = °.

Ratio Calculator & Simplifier Simplify any ratio A:B or A:B:C instantly. Calculate decimal value, percentage equivalent, and scale ratios to any target total. Fast, accurate, free.

Rule of Three: Direct & Inverse Proportions Calculate direct or inverse proportions instantly. Rule of Three solver for proportional and inversely proportional problems. Free, no signup.

Simple Interest Calculator Calculate simple interest using I = P × r × t. Free calculator for loans, savings & investments. Get accurate results instantly.

Simple Linear Regression Linear regression calculator: find slope, intercept & R² using least squares. Free online tool.

Sine, Cosine, and Tangent Calculator Calculate sine, cosine, and tangent of any angle instantly. Free trigonometric functions calculator.

Calculate Sphere Volume and Surface Area Calculate the volume (4/3πr³) and surface area (4πr²) of a sphere. Free sphere calculator with instant results.

Convert Square Feet to Square Meters for Real Estate Convert square feet to square meters instantly. 1 ft² = 0.0929 m². Free real estate calculator—accurate results for property measurements.

Standard Deviation and Variance Calculator Free standard deviation and variance calculator for samples and populations. Compute σ and σ² with step-by-step explanations.

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.

Calculate Triangle Area Using Heron's Formula Find triangle area with just 3 side lengths. Free, fast Heron's formula calculator—no height needed.

Education

Grades, averages, credits, scholarships.

Calculate Your Path to Mastery: The 10,000-Hour Rule Calculate how many years to master any skill using the 10,000-hour rule. Free calculator with instant results.

80/20 Learning Curve: How Many Hours to Master a Skill? Calculate hours needed to reach 80% mastery using the learning curve formula. Free skill development estimator for 2026.

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? Calculate how long it takes to read any book based on pages, daily reading minutes, and genre. Predicts completion date · Free & instant.

Chess ELO rating change calculator Calculate your chess ELO rating change after any game. See how wins, draws, and losses affect your rating instantly.

Cornell Notes for Book Chapters Calculate chapter study time using the Cornell note-taking method (5-R system). Free, fast, and science-backed.

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 optimal review intervals using the Ebbinghaus forgetting curve: 1, 7, 30 days. Free spaced repetition scheduling tool.

English Language Levels Estimate how long to progress through English CEFR levels A1–C2 based on study hours per week.

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.

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 4.0 Scale Converter Convert your grades to US GPA 4.0 scale for college applications. Quick, free, accurate calculator.

How Long Will It Take to Graduate? Calculate your realistic graduation timeline based on courses per semester and passing rate. Get your degree completion estimate instantly.

High School GPA Calculator Calculate your high school GPA instantly and track academic standing. Free online GPA calculator—no registration needed.

Is It Possible to Learn 2 Languages at Once? Calculate if your daily study time allows learning 2 languages in parallel without losing progress. Estimate interference and efficiency — free & instant.

Convert Between IELTS and TOEFL Scores Convert IELTS, TOEFL iBT, and CEFR scores instantly. Free equivalency calculator with 2026 conversion tables and proficiency levels.

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.

Calculate Your Reading Speed Calculate your reading speed in words per minute. Test your WPM and get a classification of your reading ability. Free online calculator.

How Many Books Should You Read Per Month? Calculate how many books to read monthly to reach your annual reading goal. Tips and strategies to build a sustainable reading habit.

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 You Need to Pass Your Final Exam? Calculate the minimum grade you need on your final exam to achieve your target GPA. Free calculator, instant results.

Optimal Exam Review Schedule Plan your exam reviews using spaced repetition science. Determine when to study for maximum retention before exam day.

Optimize Your Study Sessions with the Pomodoro Technique Calculate optimal Pomodoro work-break blocks: 25/5 standard or 50/10 deep focus. Free, fast, and science-backed.

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

Reading Speed Calculator: WPM & Book Time Calculate how fast you read (WPM) and estimate total book reading time. Accurate, free, and updated for 2026.

Scholarship GPA Requirements Calculator Calculate minimum GPA requirements for Chevening, Fulbright, OEA, and Erasmus scholarships. Free instant calculator updated for 2026.

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 Job Competition Points Calculator Calculate your teaching job competition score based on degrees, experience, publications, and professional development. Free scoring tool.

Estimate your thesis writing timeline Calculate how long it takes to write your thesis based on word count and writing speed. Free thesis timeline estimator.

UBA CBC Academic Standing Calculator Check if you'll maintain regular status at UBA CBC. Enter your attendance and exam scores to see if you meet the 2026 requirements.

UBA XXI Final Grade Calculator Calculate your UBA XXI final grade using the official formula: 40% coursework + 60% exam. Instant results.

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.

Check Your Vocabulary Level by Words Known Discover your vocabulary level by counting words you know. Free CEFR level calculator for English learners. No registration required.

Calculate Your Weighted Grade Average Calculate your weighted grade average by credit hours. Free, fast, and accurate university GPA calculator for any course load.

Automotive

Fuel consumption, insurance, registration fees.

Calculate Your Oil Change Interval Free oil change interval calculator. Find when to change your oil based on type. Fast & accurate for all oil types.

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 monthly car loan payments with the French amortization method. Free calculator, instant results.

Calculate Car Battery CCA Needs Calculate Cold Cranking Amps (CCA) for your car battery. Free calculator for gasoline & diesel engines. Find your battery's required CCA.

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 between Newton-meters, foot-pounds, and kilogram-meters. Fast & accurate calculations.

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. Calculate electricity vs fuel savings instantly. Free calculator updated for 2026.

Extra Fuel from Your Car's Air Conditioning Calculate extra fuel consumption from your car's A/C. Free calculator to estimate hourly impact on fuel economy and monthly costs.

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 Calculate your pickup truck's maximum payload capacity. GVWR minus curb weight. Free, quick, and accurate.

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 Estimate 3D print time using model height, layer height, print speed, and layer area. Get accurate hours for FDM printing. Free calculator.

Streaming Bitrate Calculator Calculate recommended bitrate for streaming in HD, 4K, and more. Find optimal upload speeds for YouTube, Twitch, and Kick.

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.

Calculate CIDR Subnetting & Subnet Masks Calculate CIDR subnets instantly. Find hosts per subnet, subnet masks, and broadcast addresses. Free, no registration needed.

Claude vs Gemini: Pricing & Token Comparison Compare Claude, Gemini & OpenAI pricing. Calculate monthly API costs by tokens. Updated 2026.

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.

File Size and Byte Converter Convert between bytes, KB, MB, GB, and TB instantly. Free calculator for file size conversions and storage calculations.

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 & Layers Calculator Calculate Docker image size by base OS. Estimate layers, dependencies, and total size. Free tool updated for 2026.

Print Resolution Calculator — DPI to Pixels Calculate ideal pixel resolution for printing any size. Convert DPI to pixels instantly. Free online print resolution calculator.

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

Calculate File Compression Ratio Calculate file compression ratio instantly. See how much space you save when compressing files to ZIP format. Free online calculator.

File Download Time Calculator Calculate how long to download files by file size and internet speed. Instant, free download time estimator.

Calculate Gaming FPS and Perceived Smoothness Calculate frame latency from gaming FPS. Understand perceived smoothness in games. Free and instant calculations.

Gaming PC Budget Calculator by FPS Target Calculate your gaming PC budget based on target FPS. Get GPU and CPU recommendations for 1080p, 1440p, and 4K gaming with 2026 pricing.

Calculate Git Repository Size Estimate repository size from commits and files. Free & instant.

GPU Rental Cost Calculator Calculate monthly GPU cloud rental costs on Vast.ai, RunPod, or Lambda vs. owning. Compare RTX 4090, A100, H100 rates and find your break-even month.

bcrypt: Cost vs Hashing Time Calculate bcrypt hashing time by cost factor. Understand how 2^n cost affects performance. Free, instant, no signup required.

Calculate Your Home's Monthly Electricity Costs Calculate kWh usage and monthly electricity costs for household appliances. Free, fast & accurate. 2026 rates.

JPG Quality vs File Size Calculator Estimate JPG file size by quality percentage. Optimize images for web instantly—free tool.

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

Midjourney Pricing Calculate Midjourney plan costs and GPU hours. Compare all subscription tiers—Basic to Mega—with 2026 pricing.

OpenAI API Monthly Cost Calculator Calculate your OpenAI API monthly spend. Estimate GPT-4o, GPT-4o-mini, and o3 costs by token usage, daily requests, and Batch API discounts.

Safe Overclock Temperature Calculator Check if your CPU or GPU temperature is safe for overclocking. Calculate your thermal margin to prevent throttling based on your cooling setup.

Evaluate Your Page Load Time (Core Web Vitals) Evaluate LCP, FID, and CLS metrics instantly. Free Core Web Vitals calculator to assess your web page load time performance.

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. Free, instant, and accurate power draw calculations.

RAID Storage Capacity Calculator Calculate usable capacity and fault tolerance by RAID level. Free RAID calculator for IT professionals and students.

API Rate Limit Calculator Convert RPM, RPS, RPH, and RPD for API rate limiting. Free, fast, accurate calculator.

How Much RAM Do You Need? Discover how much RAM you really need. Free calculator with personalized recommendations for gaming, work, coding, video editing & more.

Screen Pixel Density (PPI) Calculator Calculá píxeles por pulgada (PPI) de tu pantalla en segundos. Verifica si es calidad Retina y elige el mejor display para trabajo. Gratis y sin registro.

Calculate Allowed Downtime by SLA Level Calculate allowed downtime minutes by SLA level. Free and instant uptime calculator.

ChatGPT API Cost Calculator Estimate monthly costs for ChatGPT & GPT-4 API usage. Free calculator for token-based pricing with 2026 rates.

DNS TTL and Propagation Free DNS TTL calculator: Calculate propagation time instantly. How long until your DNS changes go live?

UPS Battery Backup Time Calculate UPS backup time in minutes based on capacity and load. Free instant calculator for server protection.

Calculate Video File Size by Bitrate & Duration Calculate video file size in GB from bitrate and duration. Free, instant calculator with no sign-up required.

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.

Calculate Your Pet's Annual Carbon Footprint Calculate annual CO₂ emissions from your dog or cat based on weight. Food is the largest source. Free, instant calculator.

How Many Trees Offset Your Flight CO₂? Calculate how many trees you need to plant to offset flight CO2 emissions. Free and fast calculator updated 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 Emissions: Text vs. Attachments CO₂ Calculator Estimate CO₂ emissions from emails with or without large attachments. Free calculator for your carbon footprint. 2026 data included.

Calculate Your Appliance Energy Savings Calculate appliance upgrade savings in kWh and dollars. See how much you'll save switching to A+++ energy efficient models today.

How Long Do Materials Take to Biodegrade? See how long different waste materials take to biodegrade. Check times for plastic, paper, aluminum, and more—free and instant.

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? Calculate sheets saved annually by printing double-sided. Free paper savings calculator with environmental impact estimate.

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 Estimate total CO₂ emissions for your wedding or event based on guest count, catering, and travel. Free and instant.

Electronics

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

Amplifier Watts Per Channel Calculator: Speaker Impedance Guide Calculate power per channel for your amplifier based on speaker impedance and series/parallel connections. Ensure compatibility instantly.

Calculate Your Refrigerator's Annual Energy Consumption Estimate your refrigerator's annual kWh consumption & electricity costs. Calculate based on power and duty cycle. Compare ENERGY STAR models. Free & instant.

Battery Runtime Calculator Calculate battery runtime in hours based on amp-hour capacity and power consumption. Account for discharge efficiency and safe depth-of-discharge (DoD).

AWG Wire Gauge Calculator by Amperage Find the right AWG wire gauge for your current needs. Calculate wire diameter, cross-section in mm², and voltage drop. Free, fast, and accurate.

DC Power Supply Calculator — Watts and Amperage Needed Calculate the exact watts and amperage your DC power supply needs. 25% safety margin built in. Free, no registration.

Inductive and Capacitive Reactance Calculator Free inductive & capacitive reactance calculator. Compute XL = 2πfL and XC = 1/(2πfC) for any frequency and component values.

Power Factor Correction & Capacitor Sizing Calculator Calculate power factor (cos φ) and corrective capacitor size. Determine P, S, Q, and kVAR compensation for AC circuits.

Servo Angle Calculator by PWM Pulse Calculate servo output angle from PWM pulse width. Standard: 1ms = 0°, 1.5ms = 90°, 2ms = 180°. Free & instant.

Stepper Motor Steps & Microsteps Calculator Calculate steps per degree and revolution of a stepper motor with step angle and microstepping. Free tool.

USB File Transfer Time Calculator Calculate USB 2.0/3.0/3.1/3.2/4.0 file transfer time. Free calculator accounting for real protocol overhead (~70% of theoretical speed).