Convert miles to kilometers instantly. Type a value below to see the result, or press Swap direction to convert kilometers back to miles. The tool uses the exact conversion factor, and a quick-reference table is below.
Kilometers
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Conversion formula
Kilometers = miles × 1.609344
One mile is exactly 1.609344 km. To estimate, multiply by 1.6, or add half and a tenth: 10 miles is about 16 km.
Quick reference table
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.60934 km |
| 2 mi | 3.21869 km |
| 3 mi | 4.82803 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.0934 km |
| 13.1 mi | 21.0824 km |
| 20 mi | 32.1869 km |
| 26.2 mi | 42.1648 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.934 km |
Frequently asked questions
How do I convert miles to kilometers?
Kilometers = miles × 1.609344
How do I convert kilometers back to miles?
Use the reverse formula, or press Swap direction in the converter above. You can also use our reverse converter.
How many km is a marathon?
A marathon is 26.2 miles, which is about 42.2 km.
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Conversions use standard factors. Check critical measurements.