Running calculators › Race distances
Race distances in km and miles
A 5K is 3.1 miles, a 10K is 6.2 miles, a half marathon is 13.1 miles and a marathon is 26.2 miles. Here are the exact distances for every common race, and how long each takes at your pace.
| Race | Kilometres | Miles | About the distance |
|---|---|---|---|
| 1 mile | 1.6093 km | 1 mi | The classic track distance: four laps of a 400 m track, plus 9 m. |
| 5K | 5 km | 3.11 mi | The most popular first race, and the distance of parkrun and most fun runs. |
| 10K | 10 km | 6.21 mi | Twice a 5K. A common next goal once a 5K feels comfortable. |
| 15K | 15 km | 9.32 mi | A less common road distance, popular for autumn races. |
| 10 miles | 16.0934 km | 10 mi | A favourite US and UK road distance between a 10K and a half marathon. |
| Half marathon | 21.0975 km | 13.11 mi | Exactly half a marathon. Often trained for over 10 to 14 weeks. |
| Marathon | 42.195 km | 26.22 mi | Fixed at 42.195 km (26 miles 385 yards) since 1921. |
| 50K | 50 km | 31.07 mi | The shortest common ultramarathon, about 7.8 km longer than a marathon. |
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How long does each race take?
Finish times at an even pace. Pace per mile in brackets. For your own pace, use the pace calculator.
| Pace | 5K | 10K | Half marathon | Marathon |
|---|---|---|---|---|
| 4:00/km (6:26/mi) | 20:00 | 40:00 | 1:24:23 | 2:48:47 |
| 4:30/km (7:15/mi) | 22:30 | 45:00 | 1:34:56 | 3:09:53 |
| 5:00/km (8:03/mi) | 25:00 | 50:00 | 1:45:29 | 3:30:59 |
| 5:30/km (8:51/mi) | 27:30 | 55:00 | 1:56:02 | 3:52:04 |
| 6:00/km (9:39/mi) | 30:00 | 1:00:00 | 2:06:35 | 4:13:10 |
| 6:30/km (10:28/mi) | 32:30 | 1:05:00 | 2:17:08 | 4:34:16 |
| 7:00/km (11:16/mi) | 35:00 | 1:10:00 | 2:27:41 | 4:55:22 |
| 7:30/km (12:04/mi) | 37:30 | 1:15:00 | 2:38:14 | 5:16:28 |
| 8:00/km (12:52/mi) | 40:00 | 1:20:00 | 2:48:47 | 5:37:34 |
Questions about race distances
How many miles is a 5K?
A 5K is 5 kilometres, which is 3.11 miles.
How many miles is a 10K?
A 10K is 10 kilometres, which is 6.21 miles.
How many miles is a half marathon?
A half marathon is 13.1 miles (21.0975 km), exactly half of a marathon.
How many miles is a marathon?
A marathon is 26.2 miles (42.195 km). The exact distance, 26 miles 385 yards, has been the standard since 1921.
How long does it take to run a 5K?
At an even 6:00 per km (9:39 per mile) a 5K takes 30 minutes. The table above shows finish times for every common pace.
How long does it take to run a marathon?
At an even 6:00 per km (9:39 per mile) a marathon takes 4 hours 13 minutes. Most people run the second half a little slower than the first.
Training for one?
Train for it with friends.
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