Pace Calculator
1:23 Half Marathon Pace
To finish a Half Marathon in 1h23, you need to maintain a pace of 3:56 per km (6:20 per mile). Here's your complete split breakdown.
Pace per KM
3:56
min/km
Pace per Mile
6:20
min/mile
Average Speed
15.3
km/h
1h23 Half Marathon Splits
Plan my Half Marathon pacing strategy →| Distance | Split Pace | Cumulative Time |
|---|---|---|
| 1 km | 3:56 | 3:56 |
| 2 km | 3:56 | 7:52 |
| 3 km | 3:56 | 11:48 |
| 4 km | 3:56 | 15:44 |
| 5 km | 3:56 | 19:40 |
| 6 km | 3:56 | 23:36 |
| 7 km | 3:56 | 27:32 |
| 8 km | 3:56 | 31:28 |
| 9 km | 3:56 | 35:24 |
| 10 km | 3:56 | 39:20 |
| 11 km | 3:56 | 43:17 |
| 12 km | 3:56 | 47:13 |
| 13 km | 3:56 | 51:09 |
| 14 km | 3:56 | 55:05 |
| 15 km | 3:56 | 59:01 |
| 16 km | 3:56 | 1:02:57 |
| 17 km | 3:56 | 1:06:53 |
| 18 km | 3:56 | 1:10:49 |
| 19 km | 3:56 | 1:14:45 |
| 20 km | 3:56 | 1:18:41 |
| 21 km | 3:56 | 1:22:37 |
| 21.10 km | 3:56 | 1:23:00 |
Ready to Run a 1h23 Half Marathon?
Getting to 1h23 for your Half Marathon takes more than just knowing your pace. RunPlan creates a personalized AI training plan based on your current fitness, schedule, and race date to help you hit your goal.