Kilometers to Miles (km to mi)
A fast kilometers-to-miles calculator – the result updates as you type.
1 km = 0.621371 mi
1 km = 0.621371 mi. Enter a value and get the result instantly. Below you will find the formula and a table of commonly used values.
Formula
mi = km × 0.62137119
km to mi table
| km | mi |
|---|---|
| 1 km | 0.6214 mi |
| 2 km | 1.2427 mi |
| 5 km | 3.1069 mi |
| 10 km | 6.2137 mi |
| 20 km | 12.4274 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
| 500 km | 310.6856 mi |
| 1,000 km | 621.3712 mi |
Where it is used
We convert kilometres to miles when planning a trip in the USA or the UK, where road signs show miles, and when reading running or cycling event descriptions in English. The classic example is the marathon: 42.195 km is about 26.22 miles.
A quick mental shortcut
1 km = 0.621371 miles. Roughly, multiply kilometres by 0.6: 50 km x 0.6 = 30 miles (the exact result is 31.07 miles, so the shortcut underestimates by about 3%).
Exact examples: 10 km x 0.621371 = 6.21 miles; 100 km x 0.621371 = 62.14 miles.
Good to know
Since the 1959 agreement the international mile is exactly 1609.344 metres, so the factor does not depend on how it is measured.