About the KM to Miles Converter
This km to miles converter turns any distance in kilometers into statute miles using the exact definition of the mile (1,609.344 meters). Enter a distance and you also get yards, feet and nautical miles, plus a reference table of popular race and travel distances.
Runners use it to translate 5K, 10K, half-marathon and marathon distances; travellers use it to make sense of road signs and car-rental odometers abroad; and cyclists and hikers use it to compare routes planned in different apps.
A kilometer is about 0.621 miles, so a quick estimate is to multiply by 0.6 — or multiply by 5 and divide by 8. The calculator gives the exact figure.
With the default inputs, the miles is 6.2137 mi. Change any value above to recalculate instantly.
How to use the km to miles converter
- 1Type the distance in kilometers.
- 2Read the answer in miles at the top.
- 3Check yards, feet or nautical miles if you need them.
- 4Use the table for popular race distances like 5K and marathon.
Formula and method
The international statute mile is defined as exactly 1,609.344 meters (5,280 feet of 0.3048 m each). Converting kilometers to meters and dividing by 1,609.344 gives the exact number of miles; 0.621371 is the same factor rounded to six digits.
Yards and feet use the exact definitions 1 yd = 0.9144 m and 1 ft = 0.3048 m. Nautical miles, used at sea and in aviation, are exactly 1,852 m.
- km
- Distance in kilometers
- mi
- Distance in statute miles
Worked examples
5K run
5,000 m ÷ 1,609.344 = 3.107 miles, which is why a 5K is often called "3.1 miles".
Half marathon (21.0975 km)
The official half-marathon distance of 21.0975 km works out to 13.109 miles — the familiar "13.1".
Marathon (42.195 km)
42,195 m ÷ 1,609.344 = 26.219 miles. At sea that would be 42,195 ÷ 1,852 = 22.78 nautical miles.
Frequently asked questions
How many miles is 1 km?+
One kilometer is 0.621371 miles. Put the other way, a mile is 1.609344 kilometers.
How many miles is a 5K?+
A 5K is 3.107 miles, usually rounded to 3.1. A 10K is 6.214 miles, a half marathon is 13.109 miles and a marathon is 26.219 miles.
What is the easiest way to convert km to miles in your head?+
Multiply by 5 and divide by 8 (or multiply by 0.6 for a rough figure). For 80 km: 80 × 5 ÷ 8 = 50 miles; the exact answer is 49.7.
Is a nautical mile the same as a mile?+
No. A nautical mile is 1,852 meters, about 1.151 statute miles. It is used for navigation at sea and in the air because it relates to one minute of latitude.
Do the UK and US use the same mile?+
Yes. Both use the international mile of exactly 1,609.344 meters. The older US survey mile was retired at the end of 2022.
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