Unit Converter

Convert between units of length, mass, temperature, area, volume, speed, time and digital data — live, in your browser.

Pick a category, type a value, read it in any other unit — instantly and locally.

Each category converts through a single base unit: the value is normalised to the base (metre, kilogram, litre, second, byte…) and then expressed in the target unit. Temperature is the exception — Celsius, Fahrenheit and Kelvin convert with offsets rather than simple ratios, so it's handled separately.

Everything is computed in your browser with plain arithmetic and nothing is sent anywhere. Digital data covers both decimal (KB = 1000 B) and binary (KiB = 1024 B) units — which is exactly where most "why doesn't my disk size match?" confusion comes from.