Free online calculators

Money, health, math and dates — clear answers in your language and currency, with no sign-up.

All calculators

Plain-language explanations of how loans and savings really work, with the math shown.

Everything runs on your device
The numbers you type never leave your browser. There is no sign-up and nothing is stored on a server.
Standard formulas, shown in full
Each calculator uses the same amortization and compound-interest formulas banks use, and each page explains them step by step.
Any currency, 16 languages
Pick your currency and language. Amounts, dates and decimal marks follow the format you're used to.