Math Calculators
Free calculators for everyday and academic math
From a quick percentage to solving a system of equations or computing a standard deviation, these calculators cover the arithmetic, algebra, statistics and probability that come up in study, work and research. Enter your numbers and get a worked result instantly — everything runs in your browser, so your inputs stay private.
Browse Calculators
Percentage Calculator
Percentages, increases, decreases and differences.
Scientific Calculator
Full scientific calculator with functions and constants.
Fraction Calculator
Add, subtract, multiply and simplify fractions.
Combinations & Permutations Calculator
Combinations and permutations (nCr, nPr).
Roman Numeral Converter
Convert between Roman numerals and integers.
Statistics Calculator
Mean, median, mode, variance and more from a data set.
Equation Solver
Solve linear and quadratic equations.
Matrix Calculator
Multiply, invert and reduce matrices.
Truth Table Generator
Build truth tables for boolean expressions.
LCM & GCD Calculator
Least common multiple and greatest common divisor.
Z-Score Calculator
Z-scores and standard-normal probabilities.
Probability Calculator
Common probability computations.
Function Grapher
Plot functions interactively.
Linear Regression Calculator
Fit a line to data and get the equation.
Vector Calculator
Vector add, dot and cross products.
Set Operations Calculator
Union, intersection and difference of sets.
Standard Deviation Calculator
Population and sample standard deviation.
Karnaugh Map Solver
Simplify boolean logic with Karnaugh maps.
Derivative & Integral Calculator
Symbolic derivatives and integrals.
Frequently asked questions
Are these calculators free?
Yes. Every calculator is free to use in your browser with no signup and no limits.
Do they show the steps?
Many (equation solver, statistics, matrix) surface intermediate values, not just the final answer, so you can follow the working.