1:40 Half MarathonPace Chart & Split Guide
Pace chart for a 1:40 half marathon with mile and kilometer splits, plus modelled 5K and 10K race equivalents.
1:40 Half Marathon
Pace/km
4:44
Pace/mi
7:38
Distance
21.1km
Avg Speed
12.7km/h
Kilometer Splits
| KM | Split | Elapsed |
|---|---|---|
| 1 | 4:44 | 4:44 |
| 2 | 4:44 | 9:29 |
| 3 | 4:44 | 14:13 |
| 4 | 4:44 | 18:58 |
| 5 | 4:44 | 23:42 |
| 6 | 4:44 | 28:26 |
| 7 | 4:44 | 33:11 |
| 8 | 4:44 | 37:55 |
| 9 | 4:44 | 42:40 |
| 10 | 4:44 | 47:24 |
| 11 | 4:44 | 52:08 |
| 12 | 4:44 | 56:53 |
| 13 | 4:44 | 1:01:37 |
| 14 | 4:44 | 1:06:22 |
| 15 | 4:44 | 1:11:06 |
| 16 | 4:44 | 1:15:50 |
| 17 | 4:44 | 1:20:35 |
| 18 | 4:44 | 1:25:19 |
| 19 | 4:44 | 1:30:03 |
| 20 | 4:44 | 1:34:48 |
| 21 | 4:44 | 1:39:32 |
| 21.10Finish | 0:28 | 1:40:00 |
Mile Splits
| Mile | Split | Elapsed |
|---|---|---|
| 1 | 7:38 | 7:38 |
| 2 | 7:38 | 15:15 |
| 3 | 7:38 | 22:53 |
| 4 | 7:38 | 30:31 |
| 5 | 7:38 | 38:08 |
| 6 | 7:38 | 45:46 |
| 7 | 7:38 | 53:24 |
| 8 | 7:38 | 1:01:02 |
| 9 | 7:38 | 1:08:39 |
| 10 | 7:38 | 1:16:17 |
| 11 | 7:38 | 1:23:55 |
| 12 | 7:38 | 1:31:32 |
| 13 | 7:38 | 1:39:10 |
| 13.11Finish | 0:50 | 1:40:00 |
Modelled race equivalents for a 1:40 half marathon
If this result represents current race fitness, the standard Riegel model (k=1.06) estimates the comparison times below. They are model outputs, not guaranteed performances; terrain, conditions, pacing, fueling, and distance-specific preparation still matter.
5K
21:44
10K
45:19
Marathon
3:28:30
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Pacing Notes for Your 1:40 Half Marathon
Half Marathon Pace Considerations
- Use the split table to rehearse pacing, then adjust it for course and weather.
- Only use fueling and equipment that you have already tested in training.
- Check effort as well as pace; GPS and terrain can distort individual splits.
- A goal time alone cannot determine safe weekly mileage or workout volume.
Race Execution Prompts
Mindset
Treat the goal as a pacing hypothesis and respond to conditions and effort.
Pacing
Start controlled, monitor average pace over stable segments, and adjust rather than forcing a failing plan.
Frequently Asked Questions
What pace do I need to run a 1:40 half marathon?
The mathematical average is 4:44 per kilometer or 7:38 per mile. Course distance, GPS error, hills, wind, and aid-station time can change the pace you see on race day.
Does a 1:40 goal determine my training plan?
No. Goal time alone cannot determine safe mileage, workout volume, or recovery. Use current training history and recent performance with a qualified coach or an established plan.
Does this page prescribe nutrition or gear?
No. Fuel, hydration, footwear, and equipment are individual decisions that should be tested in training; this page calculates pacing and splits only.
What 5K and 10K times are equivalent to a 1:40 half marathon?
Using the standard Riegel model with k=1.06, the comparison times are 21:44 for 5K and 45:19 for 10K. These are modelled scenarios, not guarantees of race performance.
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