Calculadoras de Matemáticas
Porcentajes, medias, estadística y matemáticas del día a día, sin complicaciones.
29 calculadoras
- Calculadora de porcentajesResuelve cualquier problema de porcentajes: calcula el X % de un número, qué porcentaje es un valor de otro o el cambio porcentual entre dos cifras.
- Calculadora de descuentosCalcula el precio final tras un descuento. Introduce el precio original y el porcentaje de rebaja para ver cuánto pagas y cuánto ahorras al instante.
- Calculadora de mediaCalcula la media aritmética, la mediana, la suma, el mínimo y el máximo de una lista de números. Pega o escribe los valores separados por comas o espacios.
- Calculadora de desviación típicaCalcula la desviación típica (estándar) muestral o poblacional, la varianza y la media de una lista de números de forma rápida y sencilla.
- Calculadora de razones y proporcionesSimplifica una razón a su mínima expresión o resuelve una proporción para hallar el valor que falta. Introduce A:B para reducir o A:B = C:D con un hueco.
- Calculadora de error porcentualCalcula el error porcentual entre un valor experimental y el valor real, o la diferencia porcentual entre dos medidas, con el desarrollo paso a paso.
- Calculadora de MCD y MCMHalla el máximo común divisor y el mínimo común múltiplo de cualquier lista de números, con las factorizaciones en primos y la lista completa de divisores comunes.
- Calculadora de la fórmula cuadráticaResuelve cualquier ecuación de segundo grado ax² + bx + c = 0 con raíces reales o complejas, y obtén el discriminante, el vértice, el eje de simetría y la forma factorizada.
- Calculadora de fraccionesSuma, resta, multiplica o divide dos fracciones y obtén el resultado exacto simplificado, además de las formas de número mixto, decimal y porcentaje.
- Calculadora de pendienteHalla la pendiente entre dos puntos junto con la ecuación de la recta, sus intersecciones, el ángulo, la longitud, el punto medio y la pendiente perpendicular.
- Probability CalculatorCalculate the probability of two events happening together, either one happening, neither happening, and the chance of at least one success across repeated trials.
- Combinations & Permutations CalculatorCalculate nCr and nPr with and without repetition, plus factorials — and see exactly when order matters and when it does not.
- Statistics CalculatorGet the mean, median, mode, range, variance, standard deviation, and quartiles of a data set in one step, with the working shown.
- Z-Score CalculatorCalculate a z-score from a value, mean, and standard deviation, and convert it to a percentile and tail probabilities on the normal distribution.
- Logarithm CalculatorCalculate the logarithm of a number in any base, plus the natural log (ln) and common log (log₁₀), and go the other way with exponents.
- Percentage Change CalculatorFind the percentage increase or decrease between two numbers, with the exact change, the direction, and the multiplier — and see why a rise then an equal fall doesn't return you home.
- Exponent CalculatorRaise any base to any power — including negative, zero, and fractional exponents — and see the result with the rule that explains what the exponent means.
- Scientific Notation ConverterConvert any number to and from scientific notation, plus engineering notation and E-notation, with the order of magnitude and expanded standard form.
- Prime Number CalculatorCheck whether a number is prime, and get its prime factorization, number of divisors, and the nearest prime numbers above and below it.
- Square Root CalculatorFind the square root or any nth root of a number, with the simplified exact radical form, a perfect-power check, and the negative root for even roots.
- Proportion CalculatorSolve a proportion a/b = c/x for the missing value by cross multiplication, and check whether two ratios are equal — the maths of scaling and conversion.
- Sequence CalculatorFind the nth term and the sum of an arithmetic or geometric sequence from the first term, the common difference or ratio, and the number of terms.
- Modulo CalculatorCompute the remainder (modulo) and quotient of a division, with both the truncated and floored conventions shown so the negative-number cases are unambiguous.
- Rounding CalculatorRound a number to decimal places, significant figures, or the nearest multiple, with round-up and round-down shown alongside the standard rounded result.
- Factorial CalculatorCompute the factorial n! — the product of all integers up to n — with the number of digits and trailing zeros, for any n from 0 to 170.
- Confidence Interval CalculatorCalculate a confidence interval for a mean from the sample mean, standard deviation, and size, with the margin of error and standard error at your chosen confidence level.
- Sample Size CalculatorCalculate the survey sample size needed for a chosen margin of error and confidence level, with a finite-population correction for smaller populations.
- Linear Equation CalculatorFind the equation of a line through two points in slope-intercept form (y = mx + b), with the slope, x- and y-intercepts, and the line's angle.
- System of Equations CalculatorSolve a system of two linear equations in two variables (a₁x + b₁y = c₁, a₂x + b₂y = c₂) using Cramer's rule, with a diagnosis of no or infinite solutions.