How to convert miles to kilometers
Multiply the distance in miles by 1.609344. The international mile is defined as exactly 1.609344 km, so 10 mi × 1.609344 = 16.09 km and 26.2 mi = 42.16 km. The same factor converts speeds: 65 mph is 104.6 km/h.
The “Also equals” panel shows the distance in meters, feet and yards. Use the ⇄ button to switch to km to miles.
Miles to kilometers chart
| Miles | Kilometers | Common reference |
|---|---|---|
| 0.5 mi | 0.8 km | |
| 1 mi | 1.61 km | |
| 2 mi | 3.22 km | |
| 3.1 mi | 4.99 km | 5K race |
| 5 mi | 8.05 km | |
| 6.2 mi | 9.98 km | 10K race |
| 10 mi | 16.09 km | |
| 13.1 mi | 21.08 km | Half marathon |
| 20 mi | 32.19 km | |
| 26.2 mi | 42.16 km | Marathon |
| 30 mi | 48.28 km | |
| 50 mi | 80.47 km | |
| 60 mi | 96.56 km | |
| 65 mi | 104.61 km | Typical US highway limit |
| 75 mi | 120.7 km | |
| 100 mi | 160.93 km | |
| 200 mi | 321.87 km | |
| 250 mi | 402.34 km | |
| 500 mi | 804.67 km | |
| 1,000 mi | 1,609.34 km |
Where you will use this conversion
- Road trips and driving abroad where signs are in kilometers
- Race distances such as the 5K, 10K, half marathon and marathon
- Speed limits: 65 mph is 104.6 km/h and 75 mph is 120.7 km/h
- Cycling, hiking and running apps that switch between units
- Flight, cruise and travel distances
Good to know
For a quick estimate, multiply miles by 1.6 (or by 8 and divide by 5): 50 miles is about 80 km, against an exact 80.5 km. A marathon is officially 26 miles 385 yards, which is 42.195 km, so 26.2 miles (42.16 km) is a rounded figure. To go the other way, see kilometers to miles.
Frequently asked questions
How many kilometers are in a mile?
One mile equals exactly 1.609344 kilometers. To convert miles to kilometers, multiply by 1.609344.
How many km is 10 miles?
10 miles is 16.09 kilometers.
How do I convert mph to km/h?
Multiply the speed in miles per hour by 1.609344. For example, 60 mph is 96.6 km/h and 70 mph is 112.7 km/h.
How many kilometers is a marathon?
A marathon is 42.195 km, which is 26.2188 miles. The commonly quoted 26.2 miles is a rounded figure.