How to convert kilometers to miles
To convert kilometers to miles, multiply by 0.621371192237. One kilometer is about 0.621 miles, a conversion that runners, travelers and drivers use constantly when switching between metric and US maps.
Kilometer to Mile conversion table
| Kilometer (km) | Mile (mi) |
|---|---|
| 0.1 km | 0.0621371192237 mi |
| 0.5 km | 0.310685596119 mi |
| 1 km | 0.621371192237 mi |
| 2 km | 1.24274238447 mi |
| 3 km | 1.86411357671 mi |
| 4 km | 2.48548476895 mi |
| 5 km | 3.10685596119 mi |
| 10 km | 6.21371192237 mi |
| 20 km | 12.4274238447 mi |
| 25 km | 15.5342798059 mi |
| 50 km | 31.0685596119 mi |
| 100 km | 62.1371192237 mi |
| 500 km | 310.685596119 mi |
| 1,000 km | 621.371192237 mi |
About the units
Kilometer (km)
A kilometer equals 1,000 meters and is the standard unit for road distances and running races in most countries.
Mile (mi)
The international mile equals 5,280 feet, or exactly 1,609.344 meters, and is used for road distances in the US and UK.
How to use this converter
- Type the number of kilometers (km) in the input box.
- The result in miles appears instantly — no button needed.
- See the same value in every other length unit just below.
- Use “Swap units” to convert miles back to kilometers.
When you’ll use the kilometer to mile conversion
You signed up for a 10K race and want to know the distance in miles. Converting gives about 6.2 miles.
Road signs in Ireland show distances in kilometers, but your rental car’s trip meter shows miles. Converting helps you plan the drive.
💡 For a quick estimate in your head, multiply by about 0.62 (the exact factor is 0.621371192237).
Watch out for these mix-ups
- Multiplying by 1.6 instead of dividing.
- Confusing nautical miles with statute miles.
- Rounding long distances too early.
- Mixing speed and distance conversions.
Tips for better results
- Multiply kilometers by 0.621.
- Use 5 km ≈ 3.1 miles as a handy anchor.
- Keep decimals for race distances.
💡 Practical tip: A marathon is 42.195 km, which is about 26.2 miles — the official distance in both systems.
Frequently asked questions
How many miles are in one kilometer?
One kilometer equals 0.621371192237 miles. 0.621371192237 is the exact factor used by this converter.
How do I convert kilometers to miles?
Multiply the value in kilometers by 0.621371192237. To go the other way, multiply miles by 1.609344.
What is 10 km in mi?
10 km = 6.21371192237 mi. Also, 5 km = 3.10685596119 mi and 100 km = 62.1371192237 mi.
What is the difference between a kilometer and a mile?
A kilometer equals 1,000 meters and is the standard unit for road distances and running races in most countries. The international mile equals 5,280 feet, or exactly 1,609.344 meters, and is used for road distances in the US and UK.
Is this tool free and private?
Yes — the Kilometer to Mile is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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