Math calculators

Everyday arithmetic, algebra, and geometry — worked out clearly.

Percentages, fractions, ratios, geometry, and the little calculations that come up all the time — with formulas you can reuse anywhere.

Calculators

Math / Fractions

Add, subtract, multiply, and divide fractions — with automatic simplification.

basic

20,434 5.0 1 min

Math / Fractions

Convert any decimal — terminating or repeating — into its simplest fraction form with a short explanation.

basic

1,665 4.5 1 min

Math / Fractions

Find the least common multiple of two or more whole numbers, with the full prime-factor breakdown.

basic

17,192 4.5 1 min

Math / Fractions

Find the greatest common factor (also called GCD) of any list of whole numbers using the Euclidean algorithm.

basic

17,756 4.3 1 min

About this category

Percentages, fractions, ratios, geometry, and the little calculations that come up all the time — with formulas you can reuse anywhere.

Missing a calculator in Math? We'd love to hear what to build next.