Pace per mile
12:12/mi
Pace per km
7:35/km
Speed
4.92mph
Distance
21.10km
Half marathon
Show the math
Pace = 2:40:00 ÷ 13.11 mi = 12:12 /mi
Splits
| Split | Time |
|---|---|
| Mile 1 | 0:12:12 |
| Mile 2 | 0:24:25 |
| Mile 3 | 0:36:37 |
| Mile 4 | 0:48:49 |
| Mile 5 | 1:01:01 |
| Mile 6 | 1:13:14 |
| Mile 7 | 1:25:26 |
| Mile 8 | 1:37:38 |
| Mile 9 | 1:49:51 |
| Mile 10 | 2:02:03 |
| Mile 11 | 2:14:15 |
| Mile 12 | 2:26:28 |
| Mile 13 | 2:38:40 |
| Finish | 2:40:00 |
Equivalent race times
| Race | Predicted time | Pace per mile |
|---|---|---|
| 1 mile | 0:10:28 | 10:28 |
| 5K | 0:34:47 | 11:12 |
| 10K | 1:12:31 | 11:40 |
| Marathon | 5:33:35 | 12:43 |
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 2:40:00 Half marathon?
12:12 per mile, or 7:35 per kilometer.
What would that predict for other races?
1 mile about 0:10:28; 5K about 0:34:47; 10K about 1:12:31, using Riegel's formula.