Pick a category, choose the unit you are converting from, type a number — every equivalent recalculates on each keystroke. No buttons, no page reloads, nothing to install.
8 categories, 120+ units. Tap any card to open its converter.
Unit-To-Unit converts weight, temperature, length, distance, fluid volume, speed, pixel and area units entirely in your browser — nothing is sent to a server. Conversion factors are the exact legal definitions: the pound is 0.45359237 kilograms, the inch is 25.4 millimetres, the nautical mile is 1852 metres. Temperature uses offset-aware formulas across eight historical scales, and results carry up to twelve decimal places or twenty-four digits, whichever you need.