Kilometer to Mile Converter (km to mi)
1 kilometer = 0.621371 mile. The statute mile used in the US and UK is exactly 1.609344 kilometers.
Result
42.195 km = 26.218757 mi
How to convert kilometer to mile
The statute mile used in the US and UK is exactly 1.609344 kilometers. Road signs in the US show miles, while most of the world uses kilometers, so the conversion matters for driving, running and travel planning.
Formula
mi = km × 0.621371
Worked example
42.195 km × 0.621371 = 26.2188 mi
Kilometer to Mile quick-reference table
| Kilometer (km) | Mile (mi) |
|---|---|
| 1 km | 0.621371 mi |
| 5 km | 3.10686 mi |
| 10 km | 6.21371 mi |
| 25 km | 15.5343 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
Real-life examples
A 5K race is 3.11 miles, a 10K is 6.21 miles and a half-marathon of 21.0975 km is 13.1 miles.
Frequently asked questions
What is a quick way to convert miles to km in your head?
Multiply by 1.6, or add half and a tenth: 50 miles is 50 + 25 + 5 = 80 km. The exact factor is 1.609344.
How many miles is a 10K?
A 10K run is 10 kilometers, which is 6.2137 miles.
Is a nautical mile the same as a mile?
No. A nautical mile is 1.852 km, about 15 percent longer than the 1.609 km statute mile used on roads.
What is 1 kilometer in mile?
1 kilometer = 0.621371 mile (km to mi).
What is the formula to convert km to mi?
mi = km × 0.621371. For example, 42.195 km × 0.621371 = 26.2188 mi.
How do I convert mi back to km?
Use the reverse converter: 1 mile = 1.60934 kilometer. Check: 26.2188 mi converts back to 42.195 km.
Reverse conversion
Need the other direction? Mile to Kilometer converter (mi to km): 1 mile = 1.60934 kilometer.
Related length conversions
- Centimeter to Inch converter
- Inch to Centimeter converter
- Foot to Centimeter converter
- Centimeter to Foot converter
- Foot to Meter converter
- Meter to Foot converter