How many miles are in 1 kilometer?

1 kilometer equals 0.621371 mi.

How do I convert miles back to kilometers?

Use the reverse converter: 1 mile equals 1.60934 km.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert kilometers to miles, multiply the value by 0.621371192.

mi = km × 0.621371192

40 km × 0.621371192 = 24.85 mi

Kilometer (km): Used for road distances in almost every country except the US and UK. Equal to 1,000 metres.
Mile (mi): Used for road distances in the US and UK. The statute mile is exactly 1,609.344 metres, derived from the Roman mille passus.

How do I convert kilometers to miles?: To convert kilometers to miles, multiply the value by 0.621371192.
How many miles are in 1 kilometer?: 1 kilometer equals 0.621371 mi.
How many miles are in 10 kilometers?: 10 km equals 6.21371 mi.
How do I convert miles back to kilometers?: Use the reverse converter: 1 mile equals 1.60934 km.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.