Miles to kilometers
1 mile = 1.60934 kilometers
Type a value in miles (mi) to get kilometers (km) straight away. A mile is larger than a kilometer, so the number goes up. Both units belong to length, measured here against the meter.
1 mi = 1.609344 km
Formula
km = mi × 1.609344
One mile is 1.609344 kilometers, so multiply the mile value by that factor. Here mi is the value in miles and km is the result in kilometers.
Worked example: 26.2 miles × 1.609344 = 42.1648 kilometers.
Miles to kilometers table
| miles (mi) | kilometers (km) |
|---|---|
| 1 mi | 1.60934 km |
| 2 mi | 3.21869 km |
| 3 mi | 4.82803 km |
| 4 mi | 6.43738 km |
| 5 mi | 8.04672 km |
| 6 mi | 9.65606 km |
| 7 mi | 11.2654 km |
| 8 mi | 12.8748 km |
| 9 mi | 14.4841 km |
| 10 mi | 16.0934 km |
| 15 mi | 24.1402 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 30 mi | 48.2803 km |
| 40 mi | 64.3738 km |
| 50 mi | 80.4672 km |
| 60 mi | 96.5606 km |
| 75 mi | 120.701 km |
| 100 mi | 160.934 km |
Everyday miles in kilometers
| What it is | mi | km |
|---|---|---|
| a mile run | 1 mi | 1.60934 km |
| a 5K run (about) | 3.1 mi | 4.98897 km |
| a half marathon (about) | 13.1 mi | 21.0824 km |
| a marathon (about) | 26.2 mi | 42.1648 km |
| an ultramarathon | 100 mi | 160.934 km |
Quick estimate in your head
Multiply by about 1.6. For 26.2 mi that gives 41.92 km against an exact 42.1648 km, an error of 0.6%.
About the units
Mile (mi). The statute mile: 5,280 feet or exactly 1,609.344 m. Used for road distances in the US and UK.
Kilometer (km). 1,000 meters. Used for road distances and running races outside the US and UK.
Going the other way, 1 kilometer is 0.621371 miles.
Questions
How many kilometers are in 1 mile?
1 mile is 1.60934 kilometers, and 1 kilometer is 0.621371 miles.
How do I convert miles to kilometers?
Use km = mi × 1.609344. For example, 26.2 miles × 1.609344 = 42.1648 kilometers.
Is the mile to kilometer factor exact?
Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.
How much is an ultramarathon in kilometers?
100 mi is 160.934 km.
Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).
Related conversions
- kilometers to miles
- kilometers to meters
- meters to kilometers
- miles to feet
- nautical miles to kilometers
- kilometers to nautical miles