Math calculators

Enter two numbers and get the answer with every step written out, the result in other forms, a spreadsheet formula and a few practice questions with hidden answers. The calculators cover the questions that come up most in school and at work: what share one number is of another, how much something rose or fell, a percentage of an amount, fractions as decimals and factorials.

Every answer is calculated exactly on the page; decimals are rounded only for display, and repeating decimals are shown with the repeating part in brackets.

Each result page also explains what the answer means, gives a quicker way to work it out in your head and shows how to check it by working backwards, so the calculators double as a way to learn the method.