RaceThere

Half Marathon Pace Calculator

Estimate your half marathon pace with kilometer and mile splits for the full 13.1 miles.

By RaceThere Team

Enter Half Marathon Finish Time

Tip: Many half marathoners target 1:30-2:20 depending on experience. Enter the finish time that matches your race-day goal.

Average Pace
4:59 / km8:01 / mi
Splits

Kilometer Splits

  • KM 1: 4:59
  • KM 2: 9:57
  • KM 3: 14:56
  • KM 4: 19:54
  • KM 5: 24:53
  • KM 6: 29:52
  • KM 7: 34:50
  • KM 8: 39:49
  • KM 9: 44:48
  • KM 10: 49:46
  • KM 11: 54:45
  • KM 12: 59:43
  • KM 13: 64:42
  • KM 14: 69:41
  • KM 15: 74:39
  • KM 16: 79:38
  • KM 17: 84:36
  • KM 18: 89:35
  • KM 19: 94:34
  • KM 20: 99:32
  • KM 21: 104:31
  • Finish: 105:00

Mile Splits

  • Mile 1: 8:01
  • Mile 2: 16:01
  • Mile 3: 24:02
  • Mile 4: 32:02
  • Mile 5: 40:03
  • Mile 6: 48:03
  • Mile 7: 56:04
  • Mile 8: 64:05
  • Mile 9: 72:05
  • Mile 10: 80:06
  • Mile 11: 88:06
  • Mile 12: 96:07
  • Mile 13: 104:07
  • Finish: 105:00

Half Marathon pace reference

Half Marathon goal examples, using 21.0975 km. Paces rounded to the nearest second.
Finish timePace /kmPace /mile
1:30:004:166:52
1:45:004:598:01
2:00:005:419:09
2:15:006:2410:18
2:30:007:0711:27

How we calculate this

Pace = time ÷ distance; time = pace × distance.

We calculate with exact distances: 5,000 m, 10,000 m, 21,097.5 m for a half marathon, and 42,195 m for a marathon. One mile is 1,609.344 m. Results are rounded to the nearest second only for display; calculations retain the full precision.

Sources: World Athletics: half marathon distance; World Athletics: marathon distance; NIST: unit conversion factors.

Using your results

Use the splits to plan your target pace. Allow for hills and aid-station stops when deciding how to distribute your effort. The reference table shows several finish-time goals so you can compare the pace each requires.

Common questions

What pace is needed for a 2:00:00 half marathon?

A 2:00:00 half marathon requires an average pace of 5:41 per kilometer or 9:09 per mile over 21.0975 km. These displayed paces are rounded to the nearest second; the calculation assumes a constant average pace, including stops.

Why does my watch show a different pace?

Your watch divides time by its measured distance. GPS error and the path you take can differ from the official course distance used here.

Do the splits include stops?

Splits assume a constant average pace. If your target is an elapsed finish time, that average must include time spent stopped.