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Kilometres and miles both measure distance, split along the metric/imperial line. Road signs, running races, car odometers and maps switch between them, so this converter turns kilometres into miles and back with the standard fixed factor.
How is it calculated?
The conversion factor
1 mile = 1.609344 kilometres (and 1 km = 0.621371 miles).
| To convert | Do this |
|---|---|
| km → miles | multiply by 0.621371 |
| miles → km | multiply by 1.609344 |
Common values
| Kilometres | Miles |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 100 km | 62.14 mi |
Worked example
A 10 km run is 10 × 0.621371 = 6.21 miles. A 60 mph speed limit is 60 × 1.609344 = 96.6 km/h. A marathon's 42.195 km is 26.22 miles.
FAQ
How many miles is 1 km?+
One kilometre is 0.621371 miles — roughly five eighths of a mile. Multiply kilometres by 0.621371 to get miles.
How do I convert km to miles?+
Multiply the kilometre value by 0.621371. A rough mental shortcut is to multiply by 0.6, so 100 km ≈ 60 miles.
How do I convert miles to km?+
Multiply the mile value by 1.609344. So 26.2 miles (a marathon) is about 42.2 km.
What is 5 km in miles?+
5 km is 3.11 miles. A 5K race is therefore a little over three miles.
Is a mile longer than a kilometre?+
Yes. One mile is about 1.6 kilometres, so a mile is roughly 60% longer than a kilometre.