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Kilometres to miles (km to mi) for races and trips

Convert kilometres to miles (÷ 1.609344), with race distances from 5K to the marathon.

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Fromkilometre (km)
1
Tomile (mi)
0.62
Decimals2 decimals

Formula: mi = km × 0.621371192237

1 km = 0.62 mi

Common values: kilometre to mile

kmmi
1 km0.62 mi
3 km1.86 mi
5 km3.11 mi
10 km6.21 mi
15 km9.32 mi
20 km12.43 mi
21.0975 km13.11 mi
42.195 km26.22 mi
50 km31.07 mi
100 km62.14 mi
200 km124.27 mi
500 km310.69 mi
1,000 km621.37 mi

How it works

A statute mile is exactly 1.609344 km, so miles = kilometres ÷ 1.609344 (× 0.621371). A 5K run is 3.11 mi, a 10K 6.21 mi, a half marathon (21.0975 km) 13.11 mi and a marathon (42.195 km) 26.22 mi.

Runners, cyclists and drivers crossing between metric countries and the US or UK use this constantly. Speeds convert with the same factor, so 100 km/h is 62.14 mph. For nautical miles (1.852 km), use the length converter.

How to convert kilometres to miles

Formula: mi = km × 0.621371192237.

Divide the kilometres by 1.609344 (the exact length of a mile in kilometres), or multiply by 0.621371. Worked example for a 10K race: 10 ÷ 1.609344 = 6.2137 mi.

A running pace converts the other way round: a 5:00 per km pace is 5 × 1.609344 = 8.05 minutes, about 8:03 per mile. Speeds convert with the same factor as distances, so 100 km/h is 62.14 mph.

km to mi chart

Each row is computed with the same exact factor as the converter above and rounded only for display.

KilometresMilesYards
1 km0.621 mi1,094 yd
2 km1.243 mi2,187 yd
3 km1.864 mi3,281 yd
5 km3.107 mi5,468 yd
8 km4.971 mi8,749 yd
10 km6.214 mi10,936 yd
15 km9.321 mi16,404 yd
16.0934 km10 mi17,600 yd
20 km12.427 mi21,872 yd
21.0975 km13.109 mi23,073 yd
25 km15.534 mi27,340 yd
30 km18.641 mi32,808 yd
40 km24.855 mi43,745 yd
42.195 km26.219 mi46,145 yd
50 km31.069 mi54,681 yd
80 km49.71 mi87,489 yd
100 km62.137 mi109,361 yd
160 km99.419 mi174,978 yd
250 km155.343 mi273,403 yd
500 km310.686 mi546,807 yd

Everyday kilometres-to-miles examples

  • A parkrun or any 5K race: 5 km = 3.107 mi.
  • A half marathon: 21.0975 km = 13.109 mi.
  • A marathon: 42.195 km = 26.219 mi.
  • A 1,500 m track race, the metric mile: 1.5 km = 0.932 mi.
  • A 100 km ultramarathon or cycling sportive: 100 km = 62.14 mi.

How to use it

  1. Type the value in the first box; the converted value appears in the second box as you type.
  2. Or type in the second box to convert the other way.
  3. Use the Decimals menu to round, and the quick-reference table for common values.

Frequently asked questions

How many miles is 1 km?

0.621371 mi. One mile is exactly 1.609344 km.

How many miles is a 5K?

3.107 mi. A 10K is 6.214 mi.

Is there a trick for km to miles?

Multiply by 0.6 and add a little: 80 km → 48 + 1.7 ≈ 49.7 mi (exact 49.71). Consecutive Fibonacci numbers also work: 8 km ≈ 5 mi, 13 km ≈ 8 mi, 21 km ≈ 13 mi.

Are UK miles different from US miles?

No. Both use the international mile of 1609.344 m. The only other mile in common use is the nautical mile (1852 m) at sea and in the air.

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