Unit converter
Pick a category, enter a value and see the equivalent in every unit of that category at once. The conversions use exact international factors, not approximations.
The mile here is the international statute mile of 1,609.344 metres, not the nautical mile of 1,852 metres. The gallon is the US one at 3.785 litres; the imperial gallon is 4.546 litres, a 20% gap that changes any miles-per-gallon figure entirely.
Frequently asked questions
How long is a mile in kilometres?
Exactly 1.609344 km. A nautical mile, used in navigation and aviation, is 1.852 km.
How do you convert Fahrenheit to Celsius?
Subtract 32 and multiply by 5/9. Water freezes at 32 °F and boils at 212 °F.
How many kilograms is a pound?
0.45359237 kg, fixed by international agreement in 1959. An ounce is one sixteenth of a pound, 28.35 grams.