Miles to kilometers (mi to km)
Convert miles to kilometers. For length, 1 mi equals 1.609344 km.
Converter
mi to km conversion table
| Miles | Kilometers |
|---|---|
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 1000 mi | 1609.344 km |
Formula
km = mi × 1.609344
Worked example
25 mi × 1.609344 = 40.2336 km
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 mi to km = 1.60934 km
- 5 mi to km = 8.04672 km
- 100 mi to km = 160.934 km
- 2 mi to km = 3.21869 km
- 100 km to mi = 62.1371 mi
- 20 km to mi = 12.4274 mi
About miles and kilometers
Mile (mi)
The international (statute) mile is exactly 1,609.344 meters, which is 5,280 feet. It is used for road distances and speed limits in the US and UK.
Kilometer (km)
A kilometer is 1,000 meters. It is the standard unit for road distances and mapping in most of the world.
Both are units of length; the base unit used internally is m.
Notes
- The inch, foot, yard and mile are the international units, defined exactly in meters (1 in = 0.0254 m). US survey units are not included.
- The nautical mile is the international nautical mile, exactly 1,852 m.
- Negative values are accepted because length can represent a signed displacement.
mi to km FAQs
How do I convert miles to kilometers?
Multiply the number of miles by 1.609344 to get kilometers. For example, 25 mi × 1.609344 = 40.2336 km.
How many kilometers are in one mile?
1 mi = 1.609344 km and 1 km = 0.6213711922 mi. To go the other way, use the kilometers to miles converter.
How many kilometers are in 5 miles?
5 mi = 8.04672 km, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many kilometers are in 10 miles?
10 mi = 16.0934 km, rounded to 6 significant digits.
What is the formula for miles to kilometers?
km = mi × 1.609344, where mi is the number of miles and km is the result in kilometers. The reverse is mi = km × 0.6213711922.
Is the mi to km conversion exact?
Yes. The factor 1.609344 follows directly from the unit definitions (The international (statute) mile is exactly 1,609.344 meters, which is 5,280 feet; a kilometer is 1,000 meters), so the only rounding is in the digits you choose to display.
What is the difference between miles and kilometers?
The international (statute) mile is exactly 1,609.344 meters, which is 5,280 feet. It is used for road distances and speed limits in the US and UK. A kilometer is 1,000 meters. It is the standard unit for road distances and mapping in most of the world.
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Reverse: Kilometers to miles.
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Guide
Read: Meter vs Yard and Mile vs Kilometer.