How to convert miles to kilometers
To convert miles to kilometers, multiply by 1.609344. One mile is exactly 1.609344 kilometers, so converting is exact and common for running, cycling and travel planning.
Mile to Kilometer conversion table
| Mile (mi) | Kilometer (km) |
|---|---|
| 0.1 mi | 0.1609344 km |
| 0.5 mi | 0.804672 km |
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 3 mi | 4.828032 km |
| 4 mi | 6.437376 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 20 mi | 32.18688 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.344 km |
About the units
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.
Kilometer (km)
A kilometer equals 1,000 meters and is the standard unit for road distances and running races in most countries.
How to use this converter
- Type the number of miles (mi) in the input box.
- The result in kilometers appears instantly — no button needed.
- See the same value in every other length unit just below.
- Use “Swap units” to convert kilometers back to miles.
When you’ll use the mile to kilometer conversion
You are training for a half marathon advertised as 13.1 miles and your watch shows kilometers. Converting gives about 21.1 km, so you know the full distance on the watch.
A US road-trip itinerary lists 280 miles between stops and your car’s trip computer is set to kilometers. Converting gives about 451 km.
💡 For a quick estimate in your head, multiply by about 1.6 (the exact factor is 1.609344).
Watch out for these mix-ups
- Dividing by 1.6 instead of multiplying.
- Using nautical miles from a boating chart.
- Rounding race distances that need precision.
- Confusing miles per gallon with miles.
Tips for better results
- Multiply miles by 1.609 for kilometers.
- Keep decimals for race and training distances.
- Set your device to one unit for a whole training block.
💡 Practical tip: A 5K race is about 3.1 miles, and a 10-mile race is about 16.1 km.
Frequently asked questions
How many kilometers are in one mile?
One mile equals 1.609344 kilometers. 1.609344 is the exact factor used by this converter.
How do I convert miles to kilometers?
Multiply the value in miles by 1.609344. To go the other way, multiply kilometers by 0.621371192237.
What is 10 mi in km?
10 mi = 16.09344 km. Also, 5 mi = 8.04672 km and 100 mi = 160.9344 km.
What is the difference between a mile and a kilometer?
The international mile equals 5,280 feet, or exactly 1,609.344 meters, and is used for road distances in the US and UK. A kilometer equals 1,000 meters and is the standard unit for road distances and running races in most countries.
Is this tool free and private?
Yes — the Mile to Kilometer 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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