10 tools
Unit and format converters
Length, weight, area, volume, speed, data size and more, with the conversions people actually need.
Unit converters with the exact factors written out: length, weight, land and floor area (including perches, roods and acres), volume, temperature, speed, time, data sizes, fuel economy and cooking measures. Conversions use the internationally defined values, such as the foot of 0.3048 metres, and where a unit differs between countries (the cup, the gallon, the ton) the page says which one it means. Type a value and every unit updates at once.
Measurement units
Length, weight, area (perches, acres and square feet), volume, temperature, speed and time, using exact conversion factors.
Cooking, fuel and data
Cups, spoons and grams for recipes, fuel economy between km per litre and miles per gallon, and file and data sizes.