# Math

> A free suite of math calculators: percentages, fractions, statistics, probability, algebra, matrices, equations, vectors and more — instant, browser-based, no signup.

## Pages

- [Percentage Calculator](https://math.zerethon.com/percentage-calculator): Percentages, increases, decreases and differences.
- [Scientific Calculator](https://math.zerethon.com/scientific-calculator): Full scientific calculator with functions and constants.
- [Fraction Calculator](https://math.zerethon.com/fraction-calculator): Add, subtract, multiply and simplify fractions.
- [Combinations & Permutations Calculator](https://math.zerethon.com/combinatorics-calculator): Combinations and permutations (nCr, nPr).
- [Roman Numeral Converter](https://math.zerethon.com/roman-numeral-converter): Convert between Roman numerals and integers.
- [Statistics Calculator](https://math.zerethon.com/statistics-calculator): Mean, median, mode, variance and more from a data set.
- [Equation Solver](https://math.zerethon.com/equation-solver): Solve linear and quadratic equations.
- [Matrix Calculator](https://math.zerethon.com/matrix-calculator): Multiply, invert and reduce matrices.
- [Truth Table Generator](https://math.zerethon.com/truth-table-generator): Build truth tables for boolean expressions.
- [LCM & GCD Calculator](https://math.zerethon.com/lcm-gcd-calculator): Least common multiple and greatest common divisor.
- [Z-Score Calculator](https://math.zerethon.com/z-score-calculator): Z-scores and standard-normal probabilities.
- [Probability Calculator](https://math.zerethon.com/probability-calculator): Common probability computations.
- [Function Grapher](https://math.zerethon.com/function-grapher): Plot functions interactively.
- [Linear Regression Calculator](https://math.zerethon.com/linear-regression-calculator): Fit a line to data and get the equation.
- [Vector Calculator](https://math.zerethon.com/vector-calculator): Vector add, dot and cross products.
- [Set Operations Calculator](https://math.zerethon.com/set-operations-calculator): Union, intersection and difference of sets.
- [Standard Deviation Calculator](https://math.zerethon.com/standard-deviation-calculator): Population and sample standard deviation.
- [Karnaugh Map Solver](https://math.zerethon.com/karnaugh-map-solver): Simplify boolean logic with Karnaugh maps.
- [Derivative & Integral Calculator](https://math.zerethon.com/derivative-integral-calculator): Symbolic derivatives and integrals.

## Related

- All math tools (tools.zerethon.com): https://tools.zerethon.com/math-tools