Mile-by-mile splits for any half marathon goal from 56 minutes to 4 hours: even pace, a negative split or a slower first 5K, every mile, kilometer or 5K, with the gap to even pace at each marker.
What pace runs a 1:40 half marathon?
Mile-by-mile splits for any half marathon goal from 56 minutes to 4 hours: even pace, a negative split or a slower first 5K, every mile, kilometer or 5K, with the gap to even pace at each marker.
The calculator below is set to a goal of 1:40 for the 13.1 miles, run at an even pace with a split at every mile marker. Press Calculate for the pace per mile and per km, the time at each mile sign and at halfway. Switch to a negative split or a slower first 5K, or to splits every kilometer or every 5K, and the table follows.
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Half marathon splits for any goal time
Should a 1:50 runner pass halfway in 55:00 or in 55:33? Both finish in 1:50:00; the second plan runs the opening half 10 s per mile slower and comes home 1:06 faster over the second half. This calculator turns a goal time into the split for every mile, every kilometer or every 5K, for even pace, a negative split or a slower first 5K, and shows how far ahead of or behind even pace you are at each marker.
Three boxes for the time, two choices for the plan
- Hours, minutes, seconds - your goal finishing time, from 56 minutes to 4 hours. You can also leave hours empty and type the whole goal in minutes, such as 110 for 1:50:00.
- Race plan - even pace, a negative split (the second half faster) or a slower first 5K followed by an even pace to the finish.
- Pace difference and its unit - only for the last two plans: how many seconds per mile or per kilometer slower the easier part is. A typical half marathon difference is 5-15 s per mile, or 3-10 s per km; fractions such as 2.5 are fine.
- Splits every - every mile for US races and most watches set to miles, every kilometer for races marked in km, every 5K for a short list to memorize.
- Read the splits - the table gives the pace of each segment, your time at the marker, the even-pace time and how many seconds you are ahead (-) or behind (+).
Seven race plans and the splits they print
First half marathon, sub-2 goal
Situation:2:00:00, even, every mileResult: 9:09 per mile (5:41 per km), mile 10 at 1:31:32, mile 13 at 1:59:00.
Sub-2 with a held-back start
Situation:2:00:00, negative split 15 s per mileResult: first half 9:17 per mile, second 9:02, halfway 1:00:49, the second half 1:38 faster.
Crowded start, 1:45 goal
Situation:1:45:00, first 5K slower by 15 s per mileResult: 8:12 per mile to mile 3, then 7:57, only 4 s per mile under the 8:01 average.
A race marked in kilometers
Situation:1:59:59, even, every kmResult: 5:41 per km, 10 km at 56:52, 20 km at 1:53:45.
A fast club runner
Situation:1:30:00, negative split 5 s per km, every 5KResult: 5K 21:32, 10K 43:05, 15K 1:04:15, 20K 1:25:22, halfway 45:26.
A warm morning, 2:15 goal
Situation:2:15:00, first 5K slower by 20 s per mile, every 5KResult: 5K at 32:47, 47 s behind even pace, then 6:21 per km; the second half is 1:02 faster.
Run-walk finisher
Situation:2:30:00, even, every mileResult: 11:27 per mile, halfway at 1:15:00, mile 13 at 2:28:45.
Even pace for nine goal times
The checkpoints most races have: the 5K and 10K timing mats and halfway. Every value is the calculator's output for even pace.
| Goal | Per mile | Per km | 5K | 10K | Halfway |
|---|---|---|---|---|---|
| 1:30:00 | 6:52 | 4:16 | 21:20 | 42:40 | 45:00 |
| 1:35:00 | 7:15 | 4:30 | 22:31 | 45:02 | 47:30 |
| 1:40:00 | 7:38 | 4:44 | 23:42 | 47:24 | 50:00 |
| 1:45:00 | 8:01 | 4:59 | 24:53 | 49:46 | 52:30 |
| 1:50:00 | 8:23 | 5:13 | 26:04 | 52:08 | 55:00 |
| 1:55:00 | 8:46 | 5:27 | 27:15 | 54:31 | 57:30 |
| 2:00:00 | 9:09 | 5:41 | 28:26 | 56:53 | 1:00:00 |
| 2:15:00 | 10:18 | 6:24 | 32:00 | 1:03:59 | 1:07:30 |
| 2:30:00 | 11:27 | 7:07 | 35:33 | 1:11:06 | 1:15:00 |
One goal of 1:50:00, three ways to run it
Same finish time, different checkpoints. The negative split is the plan many coaches suggest for a half; the slower first 5K suits crowded starts where the first mile is lost anyway.
| Plan | Mile 3 | Halfway | Mile 10 | Second half |
|---|---|---|---|---|
| Even, 8:23 per mile | 25:10 | 55:00 | 1:23:55 | 55:00 |
| Negative split, 10 s per mile | 25:25 | 55:33 | 1:24:10 | 54:27 |
| First 5K slower, 15 s per mile | 25:45 | 55:23 | 1:24:06 | 54:37 |
Questions before the start line
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See also
Calculator verified by the LiczGrupa.pl team
Content, formulas and results have been reviewed for accuracy and relevance by our team of specialists.
Reviewed by: Patryk Matyjasik