Miles to kilometres (mi to km)
Convert miles to kilometres (× 1.609344 exactly), with a table from 1 to 1000 miles.
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Kilometres = miles × 1.609344, exactly (a mile is 1760 yards of 0.9144 m). 26.2 miles is 42.16 km, 100 miles is 160.93 km and a 3-mile walk is 4.83 km.
Use it for road distances in the US or UK, a running plan written in miles, or a car's odometer when comparing with metric service intervals. Speeds in mph convert with the same factor; there is a dedicated mph-to-km/h page with speed-limit values.
How to use it
- Type the value in the first box; the converted value appears in the second box as you type.
- Or type in the second box to convert the other way.
- Use the Decimals menu to round, and the quick-reference table for common values.
Frequently asked questions
How many km is 1 mile?
Exactly 1.609344 km.
How do I convert miles to km in my head?
Multiply by 1.6: 50 mi → 80 km (exact 80.47). For more accuracy add 0.6% more.
How many km is a marathon?
42.195 km, which is 26.219 mi. It is usually quoted as 26.2 miles.
Do nautical miles convert the same way?
No. A nautical mile is 1.852 km. Choose "nautical mile" in the length converter for sea and air distances.
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