Everyday mathematics

Percentage calculator

Find a percentage of a value, a part’s percentage, or the whole from a known part.

Compare signed percentage change and the symmetric percentage difference between values.

Add, subtract, multiply or divide fractions with exact reduced and mixed-number results.

Simplify ratios, solve a proportion or distribute a total across several shares.

Summarize a number list with average, median, modes, spread and optional weighted mean.

Convert signed integers between bases 2–36 without losing large integer precision.

Express a decimal in scientific or engineering notation with chosen significant figures.