km to miles converter

How to convert kilometers to miles

The international mile is exactly 1.609344 kilometres, because it is 1760 yards of 0.9144 m. Dividing kilometres by 1.609344 gives miles. One kilometre is 0.621371 miles. The '0.6' people use for a quick look is fine for a road sign glance and poor for a race distance. A 5 km parkrun is 3.107 miles. A marathon, defined as 42.195 km, is 26.219 miles.

Driving between a metric country and a mile-based one, running watches that can be set either way, and maps that mix the two. Speed is a different page: km/h to mph uses the same mile, but it is a speed, and this page will not turn a pace into a speed for you.

Exact formula

Formulamiles = kilometers ÷ 1.609344

miles = kilometers ÷ 1.609344 One km is 0.621371192237 mi. Ten km is 6.21371192237 mi. The worked example below uses that same conversion.

Conversion table

The kilometers column runs from 1 km (0.6214 mi) through 500 km (310.69 mi).

Worked example: Kilometers to Miles

A 5 km parkrun is 3.107 mi. The international mile is 1.609344 km, so dividing by 1.6 is already short. The marathon is defined as 42.195 km, which is 26.219 mi, not a rounded 26. A 100 km ride is 62.137 mi. A nautical mile is 1.852 km and does not belong in this division. A Scandinavian mil is 10 km and is also not this mile. Speed in km/h uses the same mile length, but it is a different quantity and a different page.

Pitfalls for kilometers to miles

• The nautical mile is 1.852 km and is not this mile. Aviation and charts use the nautical mile.
• A Scandinavian mil is 10 km and is not an international mile.
• 0.62 is a rounded kilometre. Over 100 km the missing 0.001371 mile becomes 0.137 mile.
• Miles and miles per hour are different quantities. Do not drop this result into a speed field.