UtilityBaseCalculators
KM to Miles Converter
Convert kilometers to miles and back — edit either box, both update.
Updated July 10, 2026
How to use the km to miles converter
- 1Enter a value in kilometers.
- 2Read the equivalent in miles.
- 3Or type a miles value to convert the other way.
- 4Check the reference table, including race distances.
Common uses
- Converting running or cycling distances
- Reading a road sign or map in another unit
- Planning a road trip
- Understanding car speeds and odometers
Frequently asked questions
How many miles is 1 km?
One kilometer is about 0.621 miles, since a mile is exactly 1.609344 kilometers. To convert kilometers to miles, divide by 1.609344; to go from miles to kilometers, multiply by it.
How far is a 10K in miles?
A 10-kilometer race is about 6.21 miles. A half marathon (21.1 km) is about 13.1 miles, and a full marathon (42.195 km) is 26.2 miles. The reference table shows these.
Is the km-to-mile conversion exact?
Yes. The international mile is defined as exactly 1,609.344 meters, so the conversion is exact; only the displayed decimals are rounded.
About this tool
The km to miles converter turns kilometers into miles and miles into kilometers instantly. One mile is exactly 1.609344 kilometers, so kilometers convert to miles by dividing by that (about 0.621). Edit either field and the other updates live, with a quick-reference table that includes the half and full marathon distances. It's the everyday conversion for running and cycling distances, road trips, and car speeds between metric and imperial. Everything is calculated in your browser.
Like most tools on UtilityBase, the km to miles converter runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more calculators here.
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