Kilometers to miles
Type a value in kilometers to see it in miles straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the kilometers box.
- Read the result in miles as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
mi = km × 0.6213711922
Multiply the value in kilometers by 0.6213711922 to get miles.
Example
To convert 25 km to miles: 25 × 0.6213711922 = 15.5343 mi.
Conversion table
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 | 0.621371 |
| 2 | 1.24274 |
| 3 | 1.86411 |
| 5 | 3.10686 |
| 10 | 6.21371 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 100 | 62.1371 |
| 250 | 155.343 |
| 500 | 310.686 |
| 1,000 | 621.371 |
About the units
- Kilometer
- A kilometer is exactly 1000 meters and is the usual unit for road and travel distances.
- Mile
- The international statute mile is 1760 yards, exactly 1609.344 meters, used on roads in the US and UK.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many miles are in one kilometer?
1 km = 0.621371 mi exactly.
How do I convert kilometers to miles?
Use mi = km × 0.6213711922. For example, 25 km = 15.5343 mi.
How many kilometers are in one mile?
1 mi = 1.60934 km.
Are the inch, foot and mile factors exact or rounded?
They are exact by definition. Since the 1959 agreement one inch is exactly 2.54 cm, one foot 0.3048 m and one mile 1609.344 m.
What is the difference between a mile and a nautical mile?
A statute mile is 1609.344 meters and is used on roads. A nautical mile is 1852 meters and is used at sea and in aviation.