Converting kilometers (km) to miles (mi) is essential when you travel between countries that use different road signs, compare running or cycling distances, or interpret GPS routes exported in metric units. The international mile is defined as exactly 1,609.344 meters, so one kilometer equals 1 ÷ 1.609344 miles—about 0.621371 miles per km.
mi = km ÷ 1.609344
Divide the distance in kilometers by 1.609344 to get miles. This factor comes from the exact definition of the international mile in meters and is the standard for everyday distance conversion.
| kilometer | mile |
|---|---|
| 1 | 0.62137 |
| 2 | 1.24274 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 25 | 15.53428 |
| 50 | 31.06856 |
| 100 | 62.13712 |
Your navigation shows 100 km to the next city. How many miles is that?
100 km is approximately 62.14 miles—useful for estimating fuel stops on US speedometers.
One Kilometer (km) equals 0.621371 Mile (mi)
Units of length are standardized measurements used to define physical dimensions, tolerances, and distances in engineering drawings, construction plans, and product specifications across metric and imperial systems.
One Mile (mi) equals 1.609344 Kilometers (km)
Units of length are standardized measurements used to define physical dimensions, tolerances, and distances in engineering drawings, construction plans, and product specifications across metric and imperial systems.
How many miles are in a kilometer?
One kilometer equals about 0.621371 miles. Divide your km value by 1.609344 for the exact conversion.
How do I convert 5 km to miles?
5 ÷ 1.609344 ≈ 3.11 miles—a common distance for a 5K run expressed in imperial units.
How do I convert miles back to km?
Multiply miles by 1.609344. For example, 10 mi × 1.609344 = 16.09344 km.
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