Quick Answer
A half marathon = 13.1 miles = 21.1km = 52.75 laps of a 400m track. Average finish time is around 2:00 for men and 2:15 for women. Most runners with a 10km base can be half marathon ready in 10–14 weeks.
Half Marathon Distance in Miles, Kilometres and Track Laps
The precise official half marathon distance is 21.0975 kilometres — exactly half of the marathon’s 42.195km. In miles, this works out to 13.109 miles, universally described as 13.1 miles. Here’s how the half marathon compares to other common running distances:
| Distance | Kilometres | Miles | Track laps (400m) |
|---|---|---|---|
| 1K | 1 km | 0.62 miles | 2.5 laps |
| 5K | 5 km | 3.1 miles | 12.5 laps |
| 10K | 10 km | 6.2 miles | 25 laps |
| Half marathon | 21.1 km | 13.1 miles | 52.75 laps |
| Marathon | 42.2 km | 26.2 miles | 105.5 laps |
In everyday terms: if you know a 5km route from your house, a half marathon is running that just over four times. If you walk a 1-mile loop, a half marathon is 13 of those loops. Most runners who have never run this distance before are surprised by how achievable it feels once properly trained — the half marathon has a well-earned reputation as the distance where fitness and enjoyment overlap most comfortably.
Average Half Marathon Finish Times
How long does a half marathon take? It depends heavily on fitness, training, and goals. Here are the benchmark times that most runners use:
| Goal time | Pace per mile | Pace per km | Who it suits |
|---|---|---|---|
| 3:00:00 | 13:44/mile | 8:32/km | First-time runners; walk/run approach |
| 2:30:00 | 11:27/mile | 7:06/km | Beginner runners — a common first-time goal |
| 2:15:00 | 10:19/mile | 6:24/km | Recreational runners; women's average finish |
| 2:00:00 | 9:09/mile | 5:41/km | Men's average; popular intermediate target |
| 1:45:00 | 8:01/mile | 4:58/km | Solid recreational performance |
| 1:30:00 | 6:52/mile | 4:16/km | Strong club runner level |
| 1:15:00 | 5:44/mile | 3:33/km | Competitive/semi-elite performance |
| 57:30 | 4:23/mile | 2:44/km | Men's world record (Yomif Kejelcha, 2024) |
| 1:02:52 | 4:47/mile | 2:59/km | Women's world record (Letesenbet Gidey, 2021) |
The most common goal for first-time half marathoners is finishing under 2:30. For runners who have already completed a half marathon, breaking 2:00 is the standard next milestone. Sub-1:30 is a meaningful performance that puts you in the top 15–20% of most recreational race fields. Our running pace calculator generates your target half marathon time from your current 5km or 10km pace.
Half Marathon Pace Guide
Understanding what pace you need to hold for your goal time is the most practical part of half marathon preparation. The half marathon rewards disciplined pacing — starting too fast is the most common reason recreational runners miss their goal time.
| Goal time | Required pace (per km) | Required pace (per mile) | 5km split | 10km split |
|---|---|---|---|---|
| 2:30:00 | 7:06/km | 11:27/mile | 35:33 | 1:11:07 |
| 2:15:00 | 6:24/km | 10:19/mile | 32:00 | 1:04:00 |
| 2:00:00 | 5:41/km | 9:09/mile | 28:27 | 56:50 |
| 1:45:00 | 4:58/km | 8:01/mile | 24:53 | 49:47 |
| 1:30:00 | 4:16/km | 6:52/mile | 21:20 | 42:38 |
One practical tip: a slight negative split (running the second half marginally faster than the first) produces better finishing times than going out hard and fading. Our negative split running guide covers the pacing strategy that gives most recreational runners their best half marathon results.
How Many Steps Is a Half Marathon
Step count depends on stride length, which varies with height, speed, and running form. As a practical estimate:
At an average stride length of 75cm — approximately 1,333 steps per kilometre — a half marathon (21.0975km) works out to roughly 28,130 steps. Shorter runners or those with a high-cadence style may take 32,000–36,000 steps. Taller runners with longer strides may be closer to 25,000–27,000 steps. A quick personal estimate: count your steps over a measured 100 metres, multiply by 10 to get steps-per-km, then multiply by 21.
How Long to Train for a Half Marathon
Training time depends on where you are starting from. As a general framework:
Complete beginner (no current running habit): 16–20 weeks. You need to build a running habit from scratch before adding half-marathon-specific training. Starting with a run/walk approach and building to continuous running before adding distance.
Can run 5km comfortably: 12–14 weeks. You have an aerobic base — the training focus is building the long run and developing the endurance to sustain pace past 10km.
Can run 10km comfortably: 10–12 weeks. The step from 10km to half marathon is significant but manageable with a structured plan. This is the most common starting point for half marathon training.
Strong 10km runner targeting a specific time: 8–10 weeks. With an existing endurance base, the focus shifts to race-pace specific work and long run extension. Our half marathon training plans cover structured programmes for every starting level, from first-timers through to sub-1:30 targets.
The longest training run before a half marathon is typically 16–19km (10–12 miles), performed 2–3 weeks before race day. Most coaches — including ours — do not recommend running the full 21km in training before the race. The taper (reduced training in the final 1–2 weeks) allows the body to recover fully before race day.
Half Marathon vs Other Race Distances
The half marathon occupies a unique position in the race distance spectrum. Unlike a 5km or 10km — where raw speed is the primary factor — the half marathon requires genuine endurance: the ability to sustain a consistent effort for 1.5 to 3+ hours. Unlike a full marathon, it does not require the extreme training volume or the nutritional complexity of fuelling for 4+ hours. For most runners, the half marathon is the distance where training effort and race experience are most proportional — a hard, honest effort produces a good race without the weeks of recovery that a marathon demands. Our running training plans cover the full range from 5km through marathon for every level.
Ready to Train for Your Half Marathon?
SportCoaching's half marathon training plans are structured for every level — from first-timers to runners targeting a personal best. Every plan includes paced sessions so you always know exactly what effort you're training at.
FAQ: Half Marathon Distance
How many miles is a half marathon?
13.1 miles (21.0975km). Exactly half the marathon distance of 26.2 miles (42.195km). On a 400m track, that’s 52.75 laps.
How long does it take to run a half marathon?
Average: ~2:00 for men, ~2:15 for women. Beginners: 2:15–2:45. Common goals: sub-2:30 (first-timers), sub-2:00 (intermediate), sub-1:30 (competitive). World record: 57:30 (Yomif Kejelcha, Valencia 2024).
How many km is a half marathon?
21.0975km — universally rounded to 21.1km. Exactly half of the 42.195km marathon.
How long does it take to train for a half marathon?
Complete beginner: 16–20 weeks. Can run 5km: 12–14 weeks. Can run 10km: 10–12 weeks. Strong 10km runner: 8–10 weeks. Longest training run is typically 16–19km, done 2–3 weeks before race day.
How many steps is a half marathon?
Approximately 28,000–32,000 steps for most runners, depending on stride length. At 75cm average stride length: ~28,130 steps. Estimate yours: steps-per-km × 21.
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