km to Miles Converter
1 kilometer equals about 0.621 miles, so a 10K run is 6.21 miles. This converter switches between kilometers, miles, and meters in either direction. Use it to read road signs abroad, convert a race distance, or translate a car's range between metric and imperial.
Quick answer
1 mile is exactly 1.609344 kilometers.
Result
6.213712 mi
What this tells you
- •1 mile is exactly 1.609344 kilometers.
- •To convert km to miles, multiply by 0.621371.
- •To convert miles to km, multiply by 1.609344.
- •A 5K is 3.11 miles and a 10K is 6.21 miles.
How to Use
- 1Enter the distance you want to convert.
- 2Choose the unit you are converting from.
- 3Choose the unit you are converting to.
- 4Read the converted distance below.
How It Works
Formula
miles = km / 1.609344The international mile is defined as exactly 1,609.344 meters, so divide kilometers by 1.609344 to get miles. Going the other way, multiply miles by 1.609344. The shortcut of multiplying km by 0.62 gets you close, but this tool uses the exact factor.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 10 km to miles
Divide 10 by 1.609344 to get about 6.21 miles.
Convert 26.2 miles to km
Multiply 26.2 by 1.609344 to get about 42.16 km, the marathon distance.
Kilometers to Miles Conversions
Common distances, rounded to 2 decimal places.
| Kilometers | Miles |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 21.1 km (half marathon) | 13.11 mi |
| 42.2 km (marathon) | 26.22 mi |
| 100 km | 62.14 mi |
Common mistakes
- Multiplying instead of dividing. Kilometers are shorter than miles, so the mile number is always smaller.
- Using 1.6 as the factor for long distances. Over 100 km the rounding error is more than half a mile.
- Confusing km/h and mph. This tool converts distance, so use the speed converter for speeds.