🧮 Math

A simple calculator for everyday arithmetic — addition, subtraction, multiplication, and division.

A scientific calculator with trigonometric, logarithmic, and exponential functions.

Calculate a percentage of a number, what percent one number is of another, or percentage change.

Add, subtract, multiply, or divide two fractions and get a simplified result.

Find the mean, median, mode, and range of a list of numbers.

Solve ax² + bx + c = 0 for real or complex roots, with the discriminant shown.

Generate a random integer between a minimum and maximum value.

Find the greatest common divisor and least common multiple of two numbers.

Simplify a ratio (A:B) to its lowest terms and see the decimal equivalent.

Calculate the standard deviation and variance of a list of numbers.

Convert between regular numbers and Roman numerals in both directions.