Miles to Kilometers (mi to km)
Multiply miles by 1.609344 to get kilometers. The international mile is 1,760 yards, and with the yard fixed at 0.9144 m that makes it exactly 1,609.344 m. So 10 miles is 16.09 km and 100 miles is 160.9 km.
Convert miles to km
Result
miles to km
10 mi = 16.0934 km
1 mi = 1.60934 km · 1 km = 0.621371 mi
Show the mathHow it was calculated
km = mi × 1.609344
Uses exact legal definitions; results are rounded to 6 significant figures for display.
How to convert miles to km
km = mi × 1.609344
One mile is exactly 1.609344 kilometers, so multiply by 1.609344.
Worked example: converting 10 mi:
- km = mi × 1.609344
- 10 mi × 1.609344 = 16.0934 km
Miles to km conversion table
Common values, each computed with the exact formula and rounded to 6 significant figures.
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.25 mi | 0.402336 km |
| 0.5 mi | 0.804672 km |
| 1 mi | 1.60934 km |
| 2 mi | 3.21869 km |
| 3 mi | 4.82803 km |
| 3.1 mi | 4.98897 km |
| 4 mi | 6.43738 km |
| 5 mi | 8.04672 km |
| 6 mi | 9.65606 km |
| 6.2 mi | 9.97793 km |
| 7 mi | 11.2654 km |
| 8 mi | 12.8748 km |
| 9 mi | 14.4841 km |
| 10 mi | 16.0934 km |
| 13.1 mi | 21.0824 km |
| 15 mi | 24.1402 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 26.2 mi | 42.1648 km |
| 30 mi | 48.2803 km |
| 40 mi | 64.3738 km |
| 50 mi | 80.4672 km |
| 60 mi | 96.5606 km |
| 70 mi | 112.654 km |
| 75 mi | 120.701 km |
| 100 mi | 160.934 km |
| 150 mi | 241.402 km |
| 200 mi | 321.869 km |
| 250 mi | 402.336 km |
| 300 mi | 482.803 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.34 km |
Quick reference: everyday miles in kilometers
Quarter mile (drag-racing distance)
0.25 mi = 0.402336 km
One mile
1 mi = 1.60934 km
Half marathon
13.1 mi = 21.0824 km
Marathon
26.2 mi = 42.1648 km
Cycling century
100 mi = 160.934 km
Road distances and odometers
The US and the UK post road distances in miles, while Canada, Ireland and most of continental Europe use kilometers. A 60-mile drive is 96.6 km, so a sign showing 100 km to the next city means a little over an hour at highway speed. For speeds rather than distances, see the mph to km/h converter.
Rental cars from either side of the border can show the odometer in either unit, and many let you switch the trip display. If you log business mileage for tax purposes, record the unit the odometer actually showed and convert afterwards. Rounding each trip before you add them up introduces small errors.
Cycling centuries and running mileage
Cyclists call a 100-mile ride a century, which is 160.9 km. A 'metric century' is 100 km, only 62.1 miles. Weekly running volume works the same way: a 30-mile week is 48.3 km, and a 40-mile marathon-training week is 64.4 km.
If you're switching a training plan from miles to kilometers, convert each total and then round to whole kilometers, rather than rounding the miles first. Pace needs its own conversion: an 8:00 per mile pace is 4:58 per kilometer, because each kilometer is only 62% of a mile.
Frequently asked questions
How many kilometers is 1 mile exactly?
Exactly 1.609344 km. The figure isn't measured or rounded. It follows from the 1959 definition of the yard as 0.9144 m, multiplied by the 1,760 yards in a mile. Using 1.6 is 0.6% low, which is about 1 km short over a 100-mile drive.
How do I convert a pace in minutes per mile to minutes per kilometer?
Divide the pace by 1.609344. Convert the pace to seconds first: an 8:00 mile pace is 480 seconds, and 480 ÷ 1.609344 = 298.3 seconds, or 4:58 per km. A 10:00 mile pace becomes 6:13 per km. Going the other way, multiply a per-km pace by 1.609344.
Does the US still use the survey mile?
Not for new work. The US survey mile, based on the survey foot of 1200/3937 m, was officially retired at the end of 2022. It was only about 3.2 mm longer than the international mile, so the difference only ever mattered for land surveying over long distances. Everyday distances use the international mile.