Math Calculators

These free math tools handle the everyday number problems that come up in shopping, exams, offices and banking. Work out a percentage of any number, find what percent one value is of another or measure a percentage increase or decrease in seconds.

The number to words converter writes any amount in English in the Indian system (lakh and crore) or the international system (million and billion), with a cheque-ready rupee and paise format. Each tool explains its method in plain language with worked examples, so you can check the answer yourself.