Quick Select: Popular Half Marathon Targets
Required Pace for 1:45:00 Half Marathon
Open the exact split guide4:59
per km
8:01
per mile
| Finish Time | Pace/km | Pace/mile |
|---|---|---|
| 1:10:00 | 3:19 | 5:20 |
| 1:15:00 | 3:33 | 5:43 |
| 1:20:00 | 3:48 | 6:06 |
| 1:25:00 | 4:02 | 6:29 |
| 1:30:00 | 4:16 | 6:52 |
| 1:35:00 | 4:30 | 7:15 |
| 1:40:00 | 4:44 | 7:38 |
| 1:45:00Target | 4:59 | 8:01 |
| 1:50:00 | 5:13 | 8:23 |
| 1:55:00 | 5:27 | 8:46 |
| 2:00:00 | 5:41 | 9:09 |
| 2:05:00 | 5:55 | 9:32 |
| 2:10:00 | 6:10 | 9:55 |
| 2:15:00 | 6:24 | 10:18 |
| 2:20:00 | 6:38 | 10:41 |
| 2:25:00 | 6:52 | 11:04 |
| 2:30:00 | 7:07 | 11:27 |
| 2:35:00 | 7:21 | 11:49 |
| 2:40:00 | 7:35 | 12:12 |
| 2:45:00 | 7:49 | 12:35 |
| 2:50:00 | 8:03 | 12:58 |
| 2:55:00 | 8:18 | 13:21 |
| 3:00:00 | 8:32 | 13:44 |
Predicted at other distances (Riegel's formula)
Open a dedicated kilometer-and-mile split chart for a common race goal. Each page uses the exact official distance and includes the final partial kilometer or mile.
The ultimate race pace calculator for runners. Enter your target finish time to instantly see required pace per kilometer and per mile, generate detailed race-day splits, and predict equivalent times at other distances using Riegel's formula. Supports marathons, half marathons, 10K, and 5K races. Popular searches include 1:45 half marathon pace, 3:30 marathon pace, sub-4 hour marathon splits, Boston qualifying pace, and equivalent race time predictions.
Choose 5K, 10K, half marathon, or marathon, enter a finish time, and the calculator returns pace per kilometer, pace per mile, progressive splits, and equivalent race times.
Average pace is finish time divided by race distance. The result includes both min/km and min/mile, so the global unit setting changes the primary split view without changing the target time.
Select Race Splits to see cumulative checkpoints. The final partial kilometer or mile is included, which matters for official distances such as the 42.195 km marathon and 13.109-mile half marathon.
An average pace is a planning anchor, not a command to force identical instantaneous pace on every hill or turn. Use lap pace and effort to absorb small GPS errors. On rolling courses, protect effort uphill and regain time gradually rather than surging.
Equivalent times use the Riegel endurance model. They are most informative between reasonably similar distances and assume specific preparation for the target event. Fueling, terrain, weather, and durability become increasingly important as distance grows.
A 1:45:00 half marathon averages about 4:59 per kilometer or 8:01 per mile. Open the dedicated chart below for every split.
A 4:00:00 marathon averages about 5:41 per kilometer or 9:09 per mile before allowing for extra distance or stops.
GPS can measure a slightly long or short route and instantaneous pace is noisy. Compare cumulative time at official markers and expect to run farther than the certified distance if you do not follow the shortest legal line.