1:45 half marathon pace
A 1:45 half marathon is 4:59/km (8:01/mi), 12.1 km/h.
| Change | Time | Pace |
|---|---|---|
| −2:00 | 1:43:00 | 4:537:51 |
| −1:30 | 1:43:30 | 4:547:54 |
| −1:00 | 1:44:00 | 4:567:56 |
| −0:30 | 1:44:30 | 4:577:58 |
| Your target /km | ||
| +0:30 | 1:45:30 | 5:008:03 |
| +1:00 | 1:46:00 | 5:018:05 |
| +1:30 | 1:46:30 | 5:038:07 |
| +2:00 | 1:47:00 | 5:048:10 |
Arrow keys nudge the value. Hold Shift for bigger steps.
Finish times at 4:59 per km
| Distance | Finish time |
|---|---|
| 1K | 4:59 |
| 1 mile | 8:01 |
| 5K | 24:53 |
| 10K | 49:46 |
| 10 miles | 1:20:06 |
| Half marathon | 1:45:00 |
| Marathon | 3:30:00 |
| 50K | 4:08:51 |
Splits for a 1:45 half marathon
| km | Split | Elapsed |
|---|---|---|
| 1 | 4:59 | 4:59 |
| 2 | 4:59 | 9:57 |
| 3 | 4:59 | 14:56 |
| 4 | 4:59 | 19:54 |
| 5 | 4:59 | 24:53 |
| 6 | 4:59 | 29:52 |
| 7 | 4:59 | 34:50 |
| 8 | 4:59 | 39:49 |
| 9 | 4:59 | 44:48 |
| 10 | 4:59 | 49:46 |
| 11 | 4:59 | 54:45 |
| 12 | 4:59 | 59:43 |
| 13 | 4:59 | 1:04:42 |
| 14 | 4:59 | 1:09:41 |
| 15 | 4:59 | 1:14:39 |
| 16 | 4:59 | 1:19:38 |
| 17 | 4:59 | 1:24:36 |
| 18 | 4:59 | 1:29:35 |
| 19 | 4:59 | 1:34:34 |
| 20 | 4:59 | 1:39:32 |
| 21 | 4:59 | 1:44:31 |
| Final 0.098 km | 0:29 | 1:45:00 |
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 8:01 | 8:01 |
| 2 | 8:01 | 16:01 |
| 3 | 8:01 | 24:02 |
| 4 | 8:01 | 32:02 |
| 5 | 8:01 | 40:03 |
| 6 | 8:01 | 48:03 |
| 7 | 8:01 | 56:04 |
| 8 | 8:01 | 1:04:05 |
| 9 | 8:01 | 1:12:05 |
| 10 | 8:01 | 1:20:06 |
| 11 | 8:01 | 1:28:06 |
| 12 | 8:01 | 1:36:07 |
| 13 | 8:01 | 1:44:07 |
| Final 0.109 mi | 0:53 | 1:45:00 |
What a 1:45 half marathon predicts
Estimate| Distance | Estimated time |
|---|---|
| 5K | 22:50 |
| 10K | 47:35 |
| 10 miles | 1:18:48 |
| Marathon | 3:38:55 |
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.
Between 1:40 and 1:55, a few seconds per km change the goal
Two round-number goals sit in this band, 1:45 and 1:50. The ladder above shows how few seconds per km separate them, which makes it easier to pick the one you can hold.
Easy long runs and one session a week at goal pace or a little quicker get most runners here. Practise goal pace near the end of a long run, when your legs are tired.
Plan a gel or a few mouthfuls of sports drink around halfway, and take water when it’s offered.
Pace questions runners ask
- What pace do I need for a 1:45 half marathon?
- A 1:45 half marathon is 4:59/km (8:01/mi), 12.1 km/h, held for the whole race.
- What treadmill speed is 1:45 half marathon pace?
- Set the treadmill to 12.1 km/h or 7.5 mph to run 4:59/km (8:01/mi).
- Where should I be at halfway in a 1:45 half marathon?
- With even pacing you pass halfway in 52:30; with a negative split, a little later.
- What does a 1:45 half marathon predict for other distances?
- The Riegel formula estimates 22:50 for the 5K, 47:35 for the 10K, 1:18:48 for the 10-mile race, 3:38:55 for the marathon, assuming you’ve trained for each distance.