KM to Miles Converter
Convert kilometers (km) to miles (mi) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
km to Miles formula
mi = km ÷ 1.609344
1 kilometer = 0.6214 miles · 1 mile = 1.61 kilometers
To convert kilometers to miles, divide the value by 1.609344. For example, 10 km:
mi = 10 ÷ 1.609344mi = 6.213712
So 10 km = 6.21 mi.
Mental math shortcut
Quick mental estimate: multiply by 0.6. For 10 km that gives about 6 mi — off by 0.2137 mi (3.4%). Use the exact formula when precision matters.
km to Miles conversion table
Miles back to km
The same values converted the other way, rounded for everyday use:
| Miles | Kilometers |
|---|---|
| 0.6214 mi | 1 km |
| 1.86 mi | 2.99 km |
| 3.11 mi | 5.01 km |
| 6.21 mi | 9.99 km |
| 9.32 mi | 15 km |
| 12.43 mi | 20 km |
| 13.11 mi | 21.1 km |
| 26.22 mi | 42.2 km |
About the units
Kilometers (km)
A kilometer is 1,000 meters. It is used for road distances and running races in most of the world.
Miles (mi)
A mile is 5,280 feet, or exactly 1,609.344 meters. It is the road-distance unit in the US and UK.
Frequently asked questions
How many miles are in a kilometer?
One kilometer equals 0.6214 miles.
What is 10 km in Miles?
10 km = 6.21 mi.
How do I convert Miles back to km?
Multiply the miles by 1.609344. Or use the Miles to KM converter.