10 Kilometers to Miles: 10 km = 6.21 mi

10 Kilometers to Miles

10 km to miles: 10 kilometers equals 6.21 miles. That is 6 miles and about 375 yards. Ten kilometers is one of the most popular race distances in the world, so runners convert it constantly, along with paces and split times.

For background on the unit itself, see the kilometre entry on Wikipedia.

The Kilometers to Miles Formula

miles = kilometers × 0.621371

10 × 0.621371 = 6.21 mi

You can also divide by 1.609344 to get the same result. In meters, 10 km is 10,000, and in feet it is about 32,808.

Table: 1 to 20 Kilometers in Miles

10 km and the 10K Race

A 10K race is exactly 10 kilometers, or 6.21 miles. Recreational runners often finish in 50 to 70 minutes. A pace of 6:00 per kilometer is 9:39 per mile, and 5:00 per kilometer is 8:03 per mile. If a US event lists mile markers and your watch counts in kilometers, these conversions keep you on target.

Other Race Distances in Miles

A 5K is 3.11 miles, a half marathon of 21.0975 km is 13.11 miles, and a full marathon of 42.195 km is 26.22 miles. Sticking to 6.21 miles for 10K helps you plan training runs, since many plans are written in one unit and races are measured in the other.

10 km to miles for Walking and Cycling

At a brisk walking pace of 5 km/h, 10 km takes about two hours. On a bicycle at 20 km/h, it takes about half an hour. Fitness trackers often show both units, so when you convert 10 km to miles for a challenge or charity event, note the equivalent in miles so that everyone understands the target, wherever they live.

Using 10 km to miles on Training Plans

If your plan says to run six miles and you use a kilometer watch, aim for 9.7 km. To go the other way, a 10 km long run is 6.2 miles. Round the mile figures to one decimal place and keep the exact kilometer number in your log.

Some handy comparisons: 1 km is 0.62 miles, 5 km is 3.11 miles, 10 km is 6.21 miles and 20 km is 12.43 miles. To go the other way, one mile is 1.61 km, so 6 miles is 9.66 km. Remembering 10 km to miles as 6.2 lets you check most race distances.

A Quick Mental Method

Multiply by 5, then divide by 8. For 10 km that is 50 ÷ 8 = 6.25 miles, only 0.04 above the exact 6.21.

Converting Back and Related Guides

To go back, multiply miles by 1.609344. For related pages, see what a kilometer is, kilometers vs meters and metric vs imperial.

Frequently Asked Questions

How many miles is 10 km?

10 km is 6.21 miles.

How many feet is 10 km?

10 km is about 32,808 feet.

How many km is 5 miles?

5 miles is 8.05 kilometers.

Is a 10K the same as 6 miles?

Nearly. A 10K is 6.21 miles, so it is about 0.21 miles (340 meters) longer than 6 miles.