About Calcora

Free calculators, calculated on your device.

Calcora is a static website of calculators and converters for math, finance, health, units, electronics, and more. Every tool runs entirely in your browser. Inputs are not sent to a server.

There are no accounts. Tool state can be stored in the URL hash so you can bookmark or share a result without signing up.

Formulas are the standard published ones for each topic (for example amortizing loan payment, WHO adult BMI bands, Mifflin–St Jeor TDEE). Results are estimates for education and planning, not professional, legal, or medical advice.