All tools / Conversions
Unit converter
Length, weight, temperature, volume, area, speed, data, time and fuel economy in one place.
Exact conversion factors
All factors use the international definitions: an inch is exactly 2.54 cm, a pound is exactly 0.45359237 kg, a mile is exactly 1,609.344 m. Fuel economy and temperature use formulas instead of a single factor.
Metric or imperial?
South Africa and India use metric units for almost everything. The US uses imperial units, and the UK uses miles and pints alongside metric.