Converter
Kilometres to Miles
1 km is 0.621371 mi. Type any amount below and the answer follows as you type, on your device.
The answer follows what you type, rounded to six significant figures. Nothing is sent anywhere.
The formula
mi = km × 0.621371
Multiply the kilometre figure by 0.621371.
Worked example
How many miles are in 10 kilometres?
10 km → 6.21371 mi
Multiply 10 by 0.621371. The answer is 6.21371 mi.
Quick reference
The common values, rounded to six significant figures.
| kilometres (km) | miles (mi) |
|---|---|
| 1 | 0.621371 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 21.0975 | 13.1094 |
| 42.195 | 26.2188 |
| 100 | 62.1371 |
When you need this
Running distances disagree across countries: a parkrun is 5 km but a half marathon is 13.1 miles, so pace and distance need one unit before they can be compared.
The factor above is the exact legal definition of each unit, not a rounded one, so the answers stay right at any size. Nothing here is sent to a server: the conversion runs in the page.