All tools
Unit Converter

Unit converter

Instantly convert between metric and imperial units across four categories. Results update as you type.

  • Length: km, miles, feet, inches & more
  • Weight: kg, lbs, stone, oz & more
  • Temperature: °C, °F, Kelvin
  • Volume: litres, gallons, pints & more
→

Metric vs imperial

The metric system was introduced in France in 1795. The UK uses a fascinating mix — road signs are in miles, beer is sold in pints, but medicine and science use metric exclusively.

How many miles in a kilometre?
One kilometre equals approximately 0.621371 miles. One mile is approximately 1.60934 kilometres.
What is 100°F in Celsius?
100°F is approximately 37.78°C — just above normal human body temperature of 37°C.