How to convert kilometers to miles

Step-by-step explanation of how to convert kilometers to miles, with formulas, worked examples, and a free online calculator.

Kilometers and miles are units for measuring longer distances. Kilometers are used in most countries that use the metric system. Miles are used in the United States, the United Kingdom, and a few other countries for road distances. One mile equals exactly 1.609344 kilometers, so to convert km to miles, divide by 1.609344 (or multiply by 0.621371). For example, 100 km ÷ 1.609344 = 62.137 miles. To convert miles to km, multiply by 1.609344. Quick memory aid: 1 km is roughly ⅔ of a mile, and 1 mile is roughly 1.6 km.