TOOLConvert any length or distance
This converter handles the full range of everyday length units — millimeters, centimeters, meters and kilometers on the metric side, and inches, feet, yards and miles on the imperial side. Type a value, choose what you're converting from and to, and the answer updates instantly, with a quick "1 unit = X" rate shown underneath.
Common length conversions
These metric-to-imperial factors are internationally defined exact values, so the conversions here are precise rather than approximate.
Frequently asked questions
How many centimeters are in an inch?
There are exactly 2.54 centimeters in one inch. To convert inches to centimeters, multiply by 2.54; to go the other way, divide by 2.54.
How do I convert miles to kilometers?
Multiply the number of miles by 1.609344 to get kilometers. One mile equals about 1.61 km, so 10 miles is roughly 16.09 km.
Are these conversions exact?
Yes. The imperial-to-metric factors used here are the internationally defined exact values, such as 1 inch = 2.54 cm and 1 foot = 0.3048 m, so results are precise.