Pace per mile
13:44/mi
Pace per km
8:32/km
Speed
4.37mph
Distance
21.10km
Half marathon
Show the math
Pace = 3:00:00 ÷ 13.11 mi = 13:44 /mi
Splits
| Split | Time |
|---|---|
| Mile 1 | 0:13:44 |
| Mile 2 | 0:27:28 |
| Mile 3 | 0:41:12 |
| Mile 4 | 0:54:55 |
| Mile 5 | 1:08:39 |
| Mile 6 | 1:22:23 |
| Mile 7 | 1:36:07 |
| Mile 8 | 1:49:51 |
| Mile 9 | 2:03:35 |
| Mile 10 | 2:17:18 |
| Mile 11 | 2:31:02 |
| Mile 12 | 2:44:46 |
| Mile 13 | 2:58:30 |
| Finish | 3:00:00 |
Equivalent race times
| Race | Predicted time | Pace per mile |
|---|---|---|
| 1 mile | 0:11:46 | 11:46 |
| 5K | 0:39:08 | 12:36 |
| 10K | 1:21:35 | 13:08 |
| Marathon | 6:15:17 | 14:19 |
Riegel's formula: T2 = T1 × (D2 ÷ D1)^1.06. Assumes training for the distance.
How to use it
- Enter your numbers. Switch between US and metric units at any time.
- Results update as you type, and the formula is shown so you can check it.
- Copy the link, save the plan on this device, or print it for your next appointment.
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These are estimates, not a diagnosis. A clinician can account for your health history and medicines.
Other Half marathon times
Common questions
What pace is a 3:00:00 Half marathon?
13:44 per mile, or 8:32 per kilometer.
What would that predict for other races?
1 mile about 0:11:46; 5K about 0:39:08; 10K about 1:21:35, using Riegel's formula.