Km to Miles: Kilometres to Miles
Type a distance in kilometres to get miles, or type miles to get kilometres. Results update as you type.
How to convert km to miles
Multiply the number of kilometres by 0.621371. For example, 10 km × 0.621371 = 6.21 miles. To go the other way, multiply miles by 1.609344, or divide by 0.621371.
A quick mental shortcut: multiply kilometres by 6 and divide by 10, then add a little. 50 km is about 30 miles (exactly 31.07). For miles to kilometres, multiply by 1.6.
Common distances
- 5K run: 5 km = 3.11 miles
- 10K run: 10 km = 6.21 miles
- Half marathon: 21.0975 km = 13.1 miles
- Marathon: 42.195 km = 26.2 miles
- 100 km: 62.14 miles
The international mile is defined as exactly 1,609.344 metres, so these conversions are exact definitions rather than approximations. Measure real distances with the GPS odometer.
Why two units?
Most of the world measures distance in kilometres. The United States, the United Kingdom and a few other countries still use miles on road signs, while science, sport and most maps use kilometres everywhere. That is why race distances such as the 5K and 10K are metric even in countries that drive in miles.
Conversion table
| km | miles |
|---|---|
| 1 km | 0.62 miles |
| 2 km | 1.24 miles |
| 3 km | 1.86 miles |
| 5 km | 3.11 miles |
| 8 km | 4.97 miles |
| 10 km | 6.21 miles |
| 15 km | 9.32 miles |
| 20 km | 12.43 miles |
| 21.0975 km | 13.11 miles |
| 25 km | 15.53 miles |
| 30 km | 18.64 miles |
| 40 km | 24.85 miles |
| 42.195 km | 26.22 miles |
| 50 km | 31.07 miles |
| 75 km | 46.60 miles |
| 100 km | 62.14 miles |
| 150 km | 93.21 miles |
| 200 km | 124.27 miles |
| 500 km | 310.69 miles |
| 1000 km | 621.37 miles |
km to miles: frequently asked questions
How many miles is 1 km?
1 kilometre is 0.621371 miles, a little over six tenths of a mile.
How do I convert km to miles quickly?
Multiply kilometres by 0.62. For a rough mental answer, multiply by 6 and divide by 10.
How many km is a mile?
One mile is exactly 1.609344 kilometres.
How many miles is a 5K?
A 5K is 3.11 miles, and a 10K is 6.21 miles.