About

This site is a set of free unit converters built to be fast and clear: type a number, see the answer, and see exactly how it was worked out.

Every conversion uses exact, internationally defined factors (for example 1 inch = 2.54 cm and 1 pound = 0.45359237 kg). Temperature conversions use the exact formulas, not rounded approximations. Every converter is checked by automated tests before each release.

All calculations happen in your browser. Nothing you type is sent to a server.

Found a mistake or want a new converter? Email us: [email protected]