1:31 half marathon pace
A 1:31 half marathon is 4:19/km (6:56/mi), 13.9 km/h.
| Change | Time | Pace |
|---|---|---|
| −2:00 | 1:29:00 | 4:136:47 |
| −1:30 | 1:29:30 | 4:156:50 |
| −1:00 | 1:30:00 | 4:166:52 |
| −0:30 | 1:30:30 | 4:176:54 |
| Your target /km | ||
| +0:30 | 1:31:30 | 4:206:59 |
| +1:00 | 1:32:00 | 4:227:01 |
| +1:30 | 1:32:30 | 4:237:03 |
| +2:00 | 1:33:00 | 4:247:06 |
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 4:19 per km
| Distance | Finish time |
|---|---|
| 1K | 4:19 |
| 1 mile | 6:56 |
| 5K | 21:34 |
| 10K | 43:08 |
| 10 miles | 1:09:25 |
| Half marathon | 1:31:00 |
| Marathon | 3:02:00 |
| 50K | 3:35:40 |
Splits for a 1:31 half marathon
| km | Split | Elapsed |
|---|---|---|
| 1 | 4:19 | 4:19 |
| 2 | 4:19 | 8:38 |
| 3 | 4:19 | 12:56 |
| 4 | 4:19 | 17:15 |
| 5 | 4:19 | 21:34 |
| 6 | 4:19 | 25:53 |
| 7 | 4:19 | 30:12 |
| 8 | 4:19 | 34:30 |
| 9 | 4:19 | 38:49 |
| 10 | 4:19 | 43:08 |
| 11 | 4:19 | 47:27 |
| 12 | 4:19 | 51:46 |
| 13 | 4:19 | 56:04 |
| 14 | 4:19 | 1:00:23 |
| 15 | 4:19 | 1:04:42 |
| 16 | 4:19 | 1:09:01 |
| 17 | 4:19 | 1:13:20 |
| 18 | 4:19 | 1:17:38 |
| 19 | 4:19 | 1:21:57 |
| 20 | 4:19 | 1:26:16 |
| 21 | 4:19 | 1:30:35 |
| Final 0.098 km | 0:25 | 1:31:00 |
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 6:56 | 6:56 |
| 2 | 6:56 | 13:53 |
| 3 | 6:56 | 20:49 |
| 4 | 6:56 | 27:46 |
| 5 | 6:56 | 34:42 |
| 6 | 6:56 | 41:39 |
| 7 | 6:56 | 48:35 |
| 8 | 6:56 | 55:32 |
| 9 | 6:56 | 1:02:28 |
| 10 | 6:56 | 1:09:25 |
| 11 | 6:56 | 1:16:21 |
| 12 | 6:56 | 1:23:18 |
| 13 | 6:56 | 1:30:14 |
| Final 0.109 mi | 0:46 | 1:31:00 |
What a 1:31 half marathon predicts
Estimate| Distance | Estimated time |
|---|---|
| 5K | 19:47 |
| 10K | 41:15 |
| 10 miles | 1:08:18 |
| Marathon | 3:09:44 |
These are estimates from the Riegel formula, T2 = T1 × (D2 ÷ D1)^1.06. They assume you’ve trained for the other distance, so treat them as a guide, not a promise.
1:25 to 1:40 is where even pacing pays
Bank time early and you’ll give it back, with interest, in the last 5 km. Hold the same pace from the start and let the effort rise instead.
One quality session a week, a tempo run or intervals at goal pace, plus a weekly long run builds most of what you need. Run the rest easy.
You’ll race for well over an hour and a quarter. A gel or sports drink in the second half helps; use one you’ve tried in training.
Pace questions runners ask
- What pace do I need for a 1:31 half marathon?
- A 1:31 half marathon is 4:19/km (6:56/mi), 13.9 km/h, held for the whole race.
- What treadmill speed is 1:31 half marathon pace?
- Set the treadmill to 13.9 km/h or 8.6 mph to run 4:19/km (6:56/mi).
- Where should I be at halfway in a 1:31 half marathon?
- With even pacing you pass halfway in 45:30; with a negative split, a little later.
- What does a 1:31 half marathon predict for other distances?
- The Riegel formula estimates 19:47 for the 5K, 41:15 for the 10K, 1:08:18 for the 10-mile race, 3:09:44 for the marathon, assuming you’ve trained for each distance.