Kilometers to Miles Converter
Convert kilometers to miles instantly. Type any km value and get the exact mile result. Includes a distance table, formula, and road and running examples.
Built and maintained by Will Henschell, Data Scientist. Editorial policy.
Miles (mi)
Need the reverse? Convert miles to kilometers →
Common Kilometers to Miles Conversions
| kilometers (km) | miles (mi) | Note |
|---|---|---|
| 1 km | 0.621 mi | 1 km |
| 5 km | 3.107 mi | 5K |
| 10 km | 6.214 mi | 10K |
| 21.097 km | 13.109 mi | Half marathon |
| 42.195 km | 26.219 mi | Marathon |
| 100 km | 62.137 mi | 100 km |
| 400 km | 248.548 mi | 400 km |
| 1000 km | 621.371 mi | 1,000 km |
The Kilometers-to-Miles Formula
To convert kilometers to miles, multiply by 0.621371 (or divide by 1.60934). Since 1 mile = 1.609344 km exactly, 1 km = 1 ÷ 1.609344 = 0.621371 miles. A useful mental shortcut: multiply by 5/8 (= 0.625) — accurate within 0.6% of exact. For very rough estimates, multiply by 0.6 (within 3.4%). Example: 100 km × 0.621371 = 62.14 miles.
Kilometers to Miles for Travel and Navigation
Road distances in Europe, Asia, Africa, and South America are posted in kilometers. A drive from Paris to Lyon is about 470 km = 292 miles. London to Edinburgh is about 667 km = 414 miles. In the US and UK, road signs show miles. International travelers renting cars or reading European navigation apps frequently need this conversion. Speed limits also differ by unit: a 100 km/h motorway limit = 62.1 mph; a 50 km/h city limit = 31.1 mph.
Kilometers and Miles in Running
Running events outside the US use kilometers while US road races frequently use miles. Standard distances: 5 km = 3.11 miles, 10 km = 6.21 miles, half marathon = 21.1 km = 13.1 miles, marathon = 42.2 km = 26.2 miles. Race paces bridge both systems: 5:00/km = 8:03/mile; 6:00/km = 9:39/mile; 4:30/km = 7:14/mile. GPS watches display pace in either unit and can be switched with a menu setting.
Frequently Asked Questions
How many miles is 1 kilometer?
1 kilometer equals approximately 0.621371 miles, or about ⅝ of a mile.
How do I convert km to miles?
Multiply kilometers by 0.621371. For a quick estimate, multiply by 0.625 (or 5/8). Example: 50 km × 0.621371 = 31.07 miles.
How many miles is a 10K run?
10 km × 0.621371 = 6.214 miles. A 10K race is approximately 6.2 miles.
Is 100 km about 60 miles?
Close — 100 km × 0.621371 = 62.14 miles. '60 miles' is a useful rough estimate for 100 km, but the more accurate value is just over 62 miles.