Math Tools

Proportions (rule of three), greatest common divisor and least common multiple, fractions with all four operations, interactive multiplication tables and weighted grade averages: the maths people need most, from primary school to university, in one place. Every tool shows its working step by step, so you learn the method, not just the answer.

The tools run in your browser, are free and need no account. Neighbouring tools such as the percentage calculator and unit converter live in the other categories.