Miles to Kilometers
Convert miles (mi) to kilometers (km). 1 mi = 1.609344 km (and 1 km = 0.62137119 mi). It all runs locally in your browser.
Miles to Kilometers table
| Miles | Kilometers |
|---|---|
| 0.5 mi | 0.804672 km |
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 3 mi | 4.828032 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 |
Where this conversion shows up
Going the other way is the traveller's conversion: an American reading European road signs, or anyone translating a US race or route description into metric. It is also the speed conversion in disguise — 60 mph is about 97 km/h, and 70 mph is about 113 km/h, which is worth knowing before you rent a car abroad.
Worked example
A marathon is 26.219 miles. 26.219 × 1.609344 = 42.195 km — the exact official distance. For a road trip: 250 miles of driving is 250 × 1.609 ≈ 402 km, about four hours at motorway speeds.
Rounding and precision
Adding 60% gets you close in your head (30 miles → ~48 km; actual 48.3). For signage and trip planning, whole kilometers are fine; only surveying or race certification needs the full 1.609344 factor.
How to convert
To convert miles to kilometers, multiply by 1.609344. Need other units? Use the full Unit Converter.
FAQ
How many kilometers in a mile?
1 mile equals 1.609344 kilometers (km).
How do I convert miles to kilometers?
Multiply the miles value by 1.609344. For example, 5 mi = 8.04672 km.
How fast is 70 mph in km/h?
70 mph is 112.65 km/h. The conversion factor is the same as for distance: multiply miles per hour by 1.609344.
Why is the factor exactly 1.609344?
The international mile was defined in 1959 as exactly 1,609.344 meters (5,280 feet of exactly 0.3048 m each), so the conversion is exact, not a rounded measurement.