1:25 half marathon pace
A 1:25 half marathon is 4:02/km (6:29/mi), 14.9 km/h.
| Change | Time | Pace |
|---|---|---|
| −2:00 | 1:23:00 | 3:566:20 |
| −1:30 | 1:23:30 | 3:576:22 |
| −1:00 | 1:24:00 | 3:596:24 |
| −0:30 | 1:24:30 | 4:006:27 |
| Your target /km | ||
| +0:30 | 1:25:30 | 4:036:31 |
| +1:00 | 1:26:00 | 4:056:34 |
| +1:30 | 1:26:30 | 4:066:36 |
| +2:00 | 1:27:00 | 4:076:38 |
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 4:02 per km
| Distance | Finish time |
|---|---|
| 1K | 4:02 |
| 1 mile | 6:29 |
| 5K | 20:09 |
| 10K | 40:17 |
| 10 miles | 1:04:50 |
| Half marathon | 1:25:00 |
| Marathon | 2:50:00 |
| 50K | 3:21:27 |
Splits for a 1:25 half marathon
| km | Split | Elapsed |
|---|---|---|
| 1 | 4:02 | 4:02 |
| 2 | 4:02 | 8:03 |
| 3 | 4:02 | 12:05 |
| 4 | 4:02 | 16:07 |
| 5 | 4:02 | 20:09 |
| 6 | 4:02 | 24:10 |
| 7 | 4:02 | 28:12 |
| 8 | 4:02 | 32:14 |
| 9 | 4:02 | 36:16 |
| 10 | 4:02 | 40:17 |
| 11 | 4:02 | 44:19 |
| 12 | 4:02 | 48:21 |
| 13 | 4:02 | 52:23 |
| 14 | 4:02 | 56:24 |
| 15 | 4:02 | 1:00:26 |
| 16 | 4:02 | 1:04:28 |
| 17 | 4:02 | 1:08:29 |
| 18 | 4:02 | 1:12:31 |
| 19 | 4:02 | 1:16:33 |
| 20 | 4:02 | 1:20:35 |
| 21 | 4:02 | 1:24:36 |
| Final 0.098 km | 0:24 | 1:25:00 |
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 6:29 | 6:29 |
| 2 | 6:29 | 12:58 |
| 3 | 6:29 | 19:27 |
| 4 | 6:29 | 25:56 |
| 5 | 6:29 | 32:25 |
| 6 | 6:29 | 38:54 |
| 7 | 6:29 | 45:23 |
| 8 | 6:29 | 51:52 |
| 9 | 6:29 | 58:21 |
| 10 | 6:29 | 1:04:50 |
| 11 | 6:29 | 1:11:19 |
| 12 | 6:29 | 1:17:48 |
| 13 | 6:29 | 1:24:17 |
| Final 0.109 mi | 0:43 | 1:25:00 |
What a 1:25 half marathon predicts
Estimate| Distance | Estimated time |
|---|---|
| 5K | 18:29 |
| 10K | 38:31 |
| 10 miles | 1:03:48 |
| Marathon | 2:57:13 |
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.
From 1:10 to 1:25, the middle kilometres decide it
The opening kilometres feel controlled. The race is decided between 10 and 16 km, when holding pace starts to hurt and the finish is still a long way off.
Tempo runs and threshold intervals do most of the work, with a long run each week.
A gel around halfway is worth testing in training. Some runners race this fast without one; find out which suits you before race day.
Pace questions runners ask
- What pace do I need for a 1:25 half marathon?
- A 1:25 half marathon is 4:02/km (6:29/mi), 14.9 km/h, held for the whole race.
- What treadmill speed is 1:25 half marathon pace?
- Set the treadmill to 14.9 km/h or 9.3 mph to run 4:02/km (6:29/mi).
- Where should I be at halfway in a 1:25 half marathon?
- With even pacing you pass halfway in 42:30; with a negative split, a little later.
- What does a 1:25 half marathon predict for other distances?
- The Riegel formula estimates 18:29 for the 5K, 38:31 for the 10K, 1:03:48 for the 10-mile race, 2:57:13 for the marathon, assuming you’ve trained for each distance.