How to Convert Kilometers to Miles
Multiply kilometers by 0.6213711922 to convert km to miles. For a quick estimate, multiply by 0.62; for exact display, use the full conversion factor.
Miles to Kilometers Formula
Multiply miles by 1.609344 to convert miles to kilometers. The international mile is defined as exactly 1.609344 kilometers.
Kilometers to Miles Conversion Chart
Kilometers
Miles
Common Context
1 km
0.62 mi
1,000 m
5 km
3.11 mi
5,000 m
10 km
6.21 mi
10,000 m
21.0975 km
13.11 mi
Half marathon
42.195 km
26.22 mi
Marathon
50 km
31.07 mi
Ultra distance
100 km
62.14 mi
Long drive or ultra
Running Distances in Miles
A 5K is about 3.11 miles, a 10K is about 6.21 miles, a half marathon is about 13.11 miles, and a marathon is about 26.22 miles. These are the most common race distances runners convert.
When KM to Miles Conversion Matters
Kilometer to mile conversion is useful for running, walking, cycling, road trips, travel maps, vehicle range, international distance signs, and comparing fitness app data across metric and U.S. units.