A 5K is 3.1 miles. Precisely, it is 3.1069 miles — 3 miles and 188 yards, or 12.5 laps of a standard 400-metre track.
That extra tenth of a mile is the part worth remembering when you are pacing. Runners who plan a 5K as "three miles" arrive at what they think is the finish with 188 yards still to run, and at a 9-minute mile pace those 188 yards are close to a minute of work.
| Pace per mile | Pace per km | 5K finish time |
|---|---|---|
| 6:00 | 3:44 | 18:38 |
| 7:00 | 4:21 | 21:45 |
| 8:00 | 4:58 | 24:51 |
| 9:00 | 5:36 | 27:58 |
| 10:00 | 6:13 | 31:04 |
| 11:00 | 6:50 | 34:11 |
| 12:00 | 7:27 | 37:17 |
| 13:00 | 8:05 | 40:23 |
| 15:00 | 9:19 | 46:36 |
| 18:00 | 11:11 | 55:55 |
| 20:00 | 12:26 | 1:02:08 |
Paces of 15:00/mile and slower correspond to walking. A brisk walker finishes a 5K in about 45–50 minutes.
| Race | Kilometres | Miles |
|---|---|---|
| 5K | 5 | 3.1069 |
| 8K | 8 | 4.9710 |
| 10K | 10 | 6.2137 |
| 15K | 15 | 9.3206 |
| 10 miles | 16.0934 | 10 |
| Half marathon | 21.0975 | 13.1094 |
| Marathon | 42.195 | 26.2188 |
Where the 5K distance comes from
The 5K is a metric distance, which is why it converts to an awkward number of miles. It exists because international athletics standardised on metres, and 5,000 m has been an Olympic track event since 1912.
On the road, the 5K became the default entry-level race distance for practical reasons: it is long enough to require training but short enough that a beginner can walk it, and it fits in a park loop without closing a city.
The track version is exactly 12.5 laps of a 400 m track, running in lane 1. That half lap is why a 5,000 m race starts 200 m away from the finish line, on the opposite side of the track, rather than on it.
Pacing a 5K without a watch
Three reference points cover most goals:
- 30-minute 5K = 9:39 per mile, or 6:00 per kilometre
- 25-minute 5K = 8:03 per mile, or 5:00 per kilometre
- 20-minute 5K = 6:26 per mile, or 4:00 per kilometre
The kilometre versions are the easier ones to hold in your head, because the metric maths is clean: whatever your target minutes per kilometre, multiply by five and you have your finish time.
Going the other way, take your target finish time in minutes and divide by 3.1069 for your required mile pace. A 28-minute goal needs 9:01 per mile.
Walking a 5K
A 5K is a very walkable distance — about 6,200 to 7,800 steps for most people, and 45 minutes to an hour at a normal-to-brisk pace.
- Brisk walk (15:00/mile) — about 46 minutes
- Moderate walk (18:00/mile) — about 56 minutes
- Casual walk (20:00/mile) — about 62 minutes
Most charity and community 5Ks explicitly welcome walkers and set a course time limit well past an hour, so the distance is genuinely open to anyone who can walk for an hour. Run-walk intervals are the standard way beginners get from walking to running the full distance.
How a 5K compares to longer races
Useful ratios if you are planning a progression:
- A 10K is exactly twice a 5K: 6.2137 miles
- A half marathon is about 4.2 times a 5K: 13.1094 miles
- A marathon is about 8.4 times a 5K: 26.2188 miles
Finish times do not scale linearly, though. Doubling the distance typically costs more than double the time, because you cannot hold 5K pace for a 10K. A common rule of thumb among runners is that each doubling of distance adds roughly 5% to your pace per mile — so a 25-minute 5K runner might target a little over 52 minutes for a 10K rather than 50.
That is an estimate, not a law: your own drop-off depends on training, terrain and how well you paced the shorter race.
Frequently Asked Questions
How many miles is a 5K?
3.1069 miles, usually rounded to 3.1. Since 5,000 metres divided by 1,609.344 metres per mile equals 3.1068559…, a 5K is 3 miles plus 188 yards.
How many laps of a track is a 5K?
Exactly 12.5 laps of a standard 400-metre outdoor track, running in lane 1. On an old imperial quarter-mile track it is about 12.43 laps.
How long does it take to walk a 5K?
About 45 minutes to an hour. A brisk 15-minute-mile pace finishes in roughly 46 minutes; a casual 20-minute-mile pace takes about 62 minutes.
What pace do I need for a 30-minute 5K?
9:39 per mile, or exactly 6:00 per kilometre. The metric version is easier to pace: hold 6 minutes per kilometre and five kilometres takes 30 minutes.
How many miles is a 10K?
6.2137 miles — exactly twice a 5K. A half marathon is 13.1094 miles and a marathon is 26.2188 miles.
How many steps is a 5K?
Roughly 6,200 to 7,800 steps walking, around 7,000 for an average step length. Running a 5K takes fewer — closer to 4,300 to 5,300 — because the stride is longer.