Miles to kilometers converter (mi to km)
mi to km converter
Enter a value on either side to convert.
1 mile is exactly 1.609344 kilometers, so 5 miles is 8.0467 km and 10 miles is 16.0934 km. The mile is defined as exactly 1609.344 meters by international agreement, so every conversion on this page is a fixed multiplication rather than an estimate. The converter below works in both directions as you type.
The exact factor from miles to kilometers is 1.609344. One mile equals 1.609344 kilometers, and the converter uses that full precision internally, rounding only what you see to 4 decimal places.
Worked example: 5 mi to km
To convert 5 miles to kilometers, multiply by the exact factor 1.609344:
5 × 1.609344 = 8.04672
Rounded to 4 decimal places, 5 mi is 8.0467 km.
mi to km conversion table
| mi | km |
|---|---|
| 1 | 1.6093 |
| 2 | 3.2187 |
| 3 | 4.828 |
| 4 | 6.4374 |
| 5 | 8.0467 |
| 6 | 9.6561 |
| 7 | 11.2654 |
| 8 | 12.8748 |
| 9 | 14.4841 |
| 10 | 16.0934 |
| 11 | 17.7028 |
| 12 | 19.3121 |
| 13 | 20.9215 |
| 14 | 22.5308 |
| 15 | 24.1402 |
| 16 | 25.7495 |
| 17 | 27.3588 |
| 18 | 28.9682 |
| 19 | 30.5775 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 30 | 48.2803 |
| 35 | 56.327 |
| 40 | 64.3738 |
| 45 | 72.4205 |
| 50 | 80.4672 |
| 55 | 88.5139 |
| 60 | 96.5606 |
| 65 | 104.6074 |
| 70 | 112.6541 |
| 75 | 120.7008 |
| 80 | 128.7475 |
| 85 | 136.7942 |
| 90 | 144.841 |
| 95 | 152.8877 |
| 100 | 160.9344 |
Values are rounded to 4 decimal places with trailing zeros trimmed. Need a value that is not listed? Use the converter at the top of the page.
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Frequently asked questions
How many kilometers is 5 miles?
5 miles is 8.0467 km. The arithmetic is 5 × 1.609344 = 8.04672, which rounds to 8.0467 at 4 decimal places.
What is the exact conversion factor from miles to km?
1 mile is exactly 1.609344 kilometers, because the international mile is defined as exactly 1609.344 meters. The factor is a definition, not a measurement, so it never changes and never needs rounding.
How do I estimate miles to kilometers in my head?
Multiply by 1.6, or for a closer estimate multiply by 8 and divide by 5. For 10 miles the first method gives 16 km, close to the exact 16.0934 km.
Is a mile longer than a kilometer?
Yes. One mile is 1.6093 km, so a mile is about 61 percent longer than a kilometer. Going the other way, 1 kilometer is 0.6214 miles.
How far is a marathon in kilometers?
A marathon is 26.2 miles, which converts to 42.1648 km with the exact factor. Half marathons of 13.1 miles are 21.0824 km.