How to convert km to miles
- Type the distance in kilometers in the Value field.
- See the result in miles, highlighted at the top.
- You also see the distance in meters, feet, yards and nautical miles.
- Tap Copy result to take the equivalents with you.
The formula and examples
One kilometer is 0.621371 miles. To convert, multiply the kilometers by 0.6214: 5 km is 3.11 mi, 10 km is 6.21 mi, 21.1 km (a half marathon) is 13.11 mi and 42.195 km (a marathon) is 26.22 mi.
A mental shortcut: multiply by 6 and drop a zero: 10 km gives 6 miles, close to the real 6.21. It helps when planning road trips, races and routes in the United States or the United Kingdom.
Good to know
- The international statute mile (1609.344 m) is used.
- The result is rounded to 8 significant digits.
- For speeds (km/h to mph), use the Speed category.
Frequently asked questions
How many miles is 10 kilometers?
6.21 miles.
How many miles is 100 km?
62.14 miles.
How many miles is a marathon?
26.22 miles (42.195 km).
How do I convert km to miles in my head?
Multiply by 6 and drop a zero: it's a good approximation.