Miles to Kilometers Converter
Enter a distance in miles to see it in kilometers right away. Edit either box and the other updates live. The math runs in your browser.
How to convert miles to kilometers
- Type the distance in miles into the left box.
- Read the kilometer value in the right box as it updates live.
- Edit the kilometers box instead to convert back to miles.
Examples
One mile
1 mi
1.609344 km
Marathon distance
26.2 mi
42.16 km
Frequently asked questions
What is the formula to convert miles to kilometers?
Multiply the number of miles by 1.609344. So km = mi times 1.609344. For example, 10 miles becomes 10 times 1.609344, which is 16.09344 km.
How many kilometers is a marathon?
A marathon is 26.2 miles, which is about 42.16 km (42.195 km by the official measurement). A half marathon of 13.1 miles is roughly 21.08 km.
What is a 60 mph speed limit in kilometers per hour?
The same factor applies to speed: 60 mph is about 96.56 km/h, and 65 mph is about 104.61 km/h. Multiply the mph figure by 1.609344 to get km/h.
What are some common miles to kilometers conversions?
1 mile is 1.609344 km, 5 miles is about 8.05 km, 10 miles is 16.09344 km, and 26.2 miles (a marathon) is about 42.16 km.
Is this conversion exact?
Yes. One mile is defined as exactly 1.609344 kilometers, so the formula is exact. Results are rounded for display, but the underlying calculation is precise.
Is my data sent anywhere?
No. The conversion runs entirely in your browser, so the distances you enter never leave your device.
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