Unit Converter

Converting between units is one of the most common little tasks on the internet — a recipe in cups when you think in millilitres, a height in centimetres when you need inches, an oven in Fahrenheit when your dial is Celsius. This converter covers the categories people actually search for, with exact conversion factors.

Categories covered

- **Length** — metres, kilometres, miles, yards, feet, inches, and more - **Weight / mass** — kilograms, grams, pounds, ounces, stones, tonnes - **Temperature** — Celsius, Fahrenheit, Kelvin - **Volume** — litres, millilitres, US gallons, quarts, cups, fluid ounces - **Area** — square metres, hectares, acres, square feet - **Speed** — m/s, km/h, mph, knots - **Digital storage** — bytes through terabytes, including the 1024-based KiB/MiB/GiB

Exact, not approximate

Length and weight conversions use the internationally-agreed exact factors (one inch is defined as exactly 0.0254 metres, one pound as exactly 0.45359237 kilograms). Temperature uses the real formulas rather than rough rules of thumb, so 100 °C converts to exactly 212 °F.

KB vs KiB — why two answers exist

Digital storage has two conventions. Manufacturers use powers of 1000 (1 KB = 1000 bytes); operating systems often use powers of 1024 (1 KiB = 1024 bytes). That mismatch is why a "1 TB" drive shows as roughly 931 GiB in your file manager. Both sets of units are included so you can convert either way.

Swap and go

A one-click swap button flips the "from" and "to" units, and every conversion updates live as you type. Nothing is sent to a server.