Miles to Kilometres — mi to km
Enter a value to convert miles (mi) to kilometres (km). Works in your browser with no sign-up.
Formula
1 mi = 1.609344 km
Multiply the number of miles by 1.609344. For example, 10 mi × 1.609344 = 16.09344 km.
Quick Reference — Miles to Kilometres
About Length Units
Most of the world measures distance in metres and kilometres, while the United States uses miles, feet and inches for everyday distances, and the UK still signs its roads in miles. Nautical miles (exactly 1,852 m) are used at sea and in aviation. The inch is defined as exactly 2.54 cm and the foot as exactly 0.3048 m, so these conversions are exact.
Related Conversions
All Length Conversions
FAQ — Miles to Kilometres
How do I convert miles to kilometres?
Multiply the number of miles by 1.609344. For example, 10 mi × 1.609344 = 16.09344 km.
How many kilometres are in one mile?
1 mile = 1.609344 km (shown to up to 7 significant figures).
Is the conversion exact?
Yes for metric–imperial length: the international inch is exactly 2.54 cm, the foot exactly 0.3048 m and the mile exactly 1,609.344 m. Results are shown to 7 significant figures.
Does this converter work offline?
Yes. Once the page has loaded, conversions run entirely in your browser and nothing is sent to a server.