The Short Answer
If you can run a half marathon (13.1 miles / 21.1 km) in under 2 hours, you're faster than roughly half of all finishers. Sub-1:45 puts you in the top 25%. Sub-1:30 is competitive club-level running. But for your first half marathon, simply finishing is an achievement — crossing that line puts you in a small minority of the population.
Average Half Marathon Times by Age and Gender
The table below shows typical half marathon finish times from large-scale race result analyses. These represent everyday racers — not the general population.
| Age Group | Men (Average) | Women (Average) |
|---|---|---|
| 16–19 | 1:48:00 | 2:05:00 |
| 20–24 | 1:50:00 | 2:07:00 |
| 25–29 | 1:52:00 | 2:08:00 |
| 30–34 | 1:53:00 | 2:09:00 |
| 35–39 | 1:54:00 | 2:10:00 |
| 40–44 | 1:55:00 | 2:11:00 |
| 45–49 | 1:57:00 | 2:13:00 |
| 50–54 | 2:01:00 | 2:17:00 |
| 55–59 | 2:06:00 | 2:22:00 |
| 60–64 | 2:12:00 | 2:30:00 |
| 65–69 | 2:20:00 | 2:40:00 |
| 70+ | 2:32:00 | 2:55:00 |
Sources: Analysis of large US half marathon race results (RunRepeat, Running USA). Times represent event participants, not the general population.
Half Marathon Performance Tiers
| Level | Men | Women | What It Means |
|---|---|---|---|
| Elite | <1:05 | <1:12 | Professional / nationally competitive |
| Advanced | 1:05–1:25 | 1:12–1:35 | Dedicated club runners, 50+ miles/week |
| Competitive | 1:25–1:45 | 1:35–2:00 | Structured training, regular racers |
| Above Average | 1:45–1:55 | 2:00–2:10 | Consistent runners, faster than most |
| Average | 1:55–2:15 | 2:10–2:30 | Typical recreational racer |
| Beginner | 2:15–3:00 | 2:30–3:15 | First-timers, run-walk approach |
Why the Half Marathon Is So Popular
The half marathon has become the most popular distance race in the US for good reason: it's long enough to feel like a serious accomplishment (this is endurance running), but short enough that training doesn't take over your life. A 12-week training plan with 4 runs per week is enough for most people. Compare that to the marathon, which typically requires 16–20 weeks and 5–6 runs per week.
Factors That Affect Your Half Marathon Time
Weekly Mileage
The single biggest predictor of half marathon performance is training volume. Runners averaging 25–30 miles/week typically finish in 2:00–2:15. Those running 35–50 miles/week commonly run 1:35–1:55. More miles = more aerobic capacity = faster race.
Long Run Distance
Your longest training run matters. Aim for at least 10–12 miles before race day, with your peak long run 2–3 weeks out. Runners who top out at 8 miles in training often hit the wall around mile 10 of the race.
10K Fitness
Your 10K time is an excellent predictor of half marathon potential. A rough formula: half marathon time ≈ 10K time × 2.22. So a 50:00 10K runner can target roughly 1:51 for the half. See our guide to 10K times to benchmark your shorter-distance fitness.
Pacing Strategy
The half marathon punishes overambitious pacing. Going out even 10 seconds per mile too fast over the first 5K compounds into 2–3 minutes of suffering in the final miles. Negative splitting (running the second half slightly faster than the first) or even pacing produces the best results.
Course and Conditions
Temperature above 60°F (15°C) measurably slows half marathon times. Heat adds 1–5 minutes depending on severity. Hills, wind, and altitude also matter more at this distance because you're exposed to them for 1.5–3 hours.
How to Improve Your Half Marathon Time
- Build your weekly mileage — Target 30–45 miles/week gradually. More easy miles builds the aerobic engine that powers the half marathon.
- Run a weekly tempo — 30–50 minutes at a pace you could hold for about an hour. This is the bread-and-butter workout for the half marathon.
- Long run with pace work — Add 3–5 miles at goal half marathon pace to the end of your long run. This teaches your legs to hold pace on tired legs.
- Race 10Ks first — A few 10K races in the build-up sharpens speed and teaches pacing. Your 10K to half marathon progression builds naturally.
- Practice nutrition — At 90+ minutes of running, fueling matters. Practice with gels or chews during your long runs so race day is familiar.
- Taper properly — Reduce mileage by 30–40% in the final 10 days before the race. You won't lose fitness but you'll arrive fresh.
Know Your Target Pace
Once you've chosen a target time, use the half marathon pace chart for exact per-mile and per-km splits. Or use the pace calculator to convert any target time into pace.
Half Marathon vs. Other Race Distances
| Half Marathon Time | → 5K | → 10K | → Marathon |
|---|---|---|---|
| 1:30:00 | 19:40 | 41:00 | 3:10:00 |
| 1:45:00 | 22:55 | 47:50 | 3:42:00 |
| 2:00:00 | 26:15 | 54:40 | 4:14:00 |
| 2:15:00 | 29:30 | 1:01:30 | 4:46:00 |
| 2:30:00 | 32:45 | 1:08:20 | 5:18:00 |
Predictions use the Riegel formula (T₂ = T₁ × (D₂/D₁)^1.06). Marathon predictions assume proper marathon-specific training. Use our pace calculator for custom predictions.