Math
Percentages, unit conversions, statistics, algebra and geometry — every answer worked step by step, with the exact defined factor or formula behind it instead of a rounded rule of thumb.
5 herramientas 32 calculadoras adentro
Elegí tu pregunta
Convert length, weight, area, volume, cooling capacity, water concentration and temperature between US customary, imperial and metric units, using the exact defined factors instead of rounded shortcuts.
8 calculadoras How do I solve this equation?Solve the algebra you actually get asked for: quadratic roots and the discriminant, 2×2 linear systems by Cramer's rule, matrix determinant and inverse, logarithms in any base, arithmetic sequences, GCD and LCM, and polynomial integrals — each with the working shown.
7 calculadoras How do I work out this percentage?Work out any percentage question in one place: what is X% of a number, what percent one number is of another, percent increase or decrease, the original price before a discount, ratio simplification and the rule of three.
5 calculadoras What do these numbers actually say?Paste a list of numbers and get the mean, median, mode, range, variance and standard deviation, plus weighted averages, least-squares regression with R², and how many combinations or permutations a set allows.
7 calculadoras What is the area, the angle or the distance?Work out the area of a triangle from its three sides with Heron's formula, the volume and surface area of a sphere, the distance between two points, the sine, cosine and tangent of an angle, and the conversion between radians and degrees.
5 calculadorasSection guide
Percentages, unit conversions, statistics, algebra and geometry — every answer worked step by step, with the exact defined factor or formula behind it instead of a rounded rule of thumb.
The unit you choose in the dropdown does the actual work — every equivalent in its family comes out together. These branches add the context and the traps that matter for each kind of measurement.
Datos para la cuenta: Value to convert, Unit of that value.
Referencia: NIST.
Each branch uses a different subset of the coefficient boxes below — the help text under each box tells you what it means once you have chosen. Quadratics are the most common starting point.
Datos para la cuenta: Coefficient a, Coefficient b, Coefficient c.
Referencia: NIST.
The trap with percentages is that the same word covers formulas that give completely different answers. Start with the most common one and switch if it is not your case.
Datos para la cuenta: First number (A), Second number (B), Third number (C).
Referencia: NIST.
Statistics is several different questions wearing one name. Start with describing a single set — the most common case — and switch branch if you have two variables, weights, or a counting problem.
Datos para la cuenta: Data set, Second data set (weights or Y values), Population or sample?.
Referencia: NIST / SEMATECH.
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These figures aggregate the decisions, variables and sources in the included hubs. The analysis is rebuilt from Hacé Cuentas’ official inventory.
Hacé Cuentas’ “Math” collection brings together 5 hubs and routes, 26 modelled variables and 31 declared sources.
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