KM to Miles Converter

How to convert kilometers to miles

1 kilometer = 0.6213711922 miles. To convert kilometers to miles, divide by 1.609344 (or multiply by 0.6213711922). A kilometer is 1,000 meters. The international mile is 5,280 feet, exactly 1,609.344 m.

Worked examples

• 5 kilometers = 3.10686 mi (5 ÷ 1.609344)
• 10 kilometers = 6.21371 mi (10 ÷ 1.609344)
• 100 kilometers = 62.1371 mi (100 ÷ 1.609344)

Where this conversion comes up

Kilometers are used for road distances and altitude outside the US; miles for road distances and speed limits in the US and UK. Road signs, race distances and car odometers switch between kilometers and miles across borders. A 5K race is 3.107 miles, a 10K is 6.214 miles and a marathon (42.195 km) is 26.219 miles.

Quick estimate

Multiply by 0.6 (3.4% low): 100 km ≈ 60 mi, exact 62.14 mi. For better accuracy use 0.62.

Common mistakes

• Multiplying instead of dividing. A mile is larger than a kilometer, so the number of miles must come out smaller: 5 kilometers = 3.10686 mi.
• Rounding too early. Keep the full factor until the last step; rounding 0.621 to 0.62 first puts large values noticeably off.

Related length converters: mm to inches, inches to mm, inches to feet, feet to inches, meters to feet, feet to meters.