Miles to Kilometres (mi to km)
1 mi = 1.609344 km. Multiply miles by 1.609344; the box below does it both ways.
kilometres
10 mi = 16.0934 km · kilometres to miles page
How to convert miles to kilometres
- Take the value in miles.
- Multiply by 1.609344 (because 1 mi = 1.609344 km).
- Example: 10 mi × 1.609344 = 16.0934 km.
- Going back: divide by 1.609344, or multiply by 0.6213712.
Where this comes up
Multiply by 1.609344. US and UK speed limits and road distances come in miles: 70 mph is 113 km/h, a 100-mile drive is 161 km. A half marathon is 13.1 miles, 21.1 km.
| mi | km |
|---|---|
| 1 | 1.6093 |
| 3 | 4.828 |
| 5 | 8.0467 |
| 10 | 16.0934 |
| 13.1 | 21.0824 |
| 26.2 | 42.1648 |
| 30 | 48.2803 |
| 50 | 80.4672 |
| 60 | 96.5606 |
| 70 | 112.6541 |
| 100 | 160.9344 |
| 200 | 321.8688 |
| 500 | 804.672 |
| 1,000 | 1,609.34 |
Questions people ask
How many kilometres are in 1 mile?
1 mi = 1.609344 km. To convert, multiply the mile value by 1.609344.
What is 50 mi in km?
50 mi is 80.4672 km.
How do I convert kilometres back to miles?
Divide by 1.609344, or multiply by 0.6213712: 1 km = 0.6213712 mi.
More length conversions
Kilometres to Miles (km to mi) · m to ft · ft to m · cm to in · in to cm · cm to ft · ft to cm · mm to in · in to mm · ft to in · in to ft · all converters
Factors are the exact international definitions; last checked 2026-10-10.