Half Marathon
Pace Calculator
Calculate the pace required to reach your half-marathon target time.
Your pace
4:59 /KM
- 8:01 /MI
- 12.1 KM/H
Your splits
| Marker | Time |
|---|---|
| 5 KM | 24:53 |
| 10 KM | 49:46 |
| 15 KM | 1:14:39 |
| 20 KM | 1:39:32 |
| Finish | 1:45:00 |
A 1:45 half marathon requires an average pace of approximately 4:59/km.
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All tools →Twelve calculators in the first lab release. All of them are live.
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LivePace ↔ Speed
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LiveHow Good Is My Time
Open
Methodology
Pace is finish time divided by distance. Displayed times round to the nearest second. Model-based tools use published formulas: Riegel, Daniels VDOT, Tanaka, Minetti, and interpolated WMA 2015 age-grading factors.
About
Runners Lab is a free, no-login collection of running calculators. Search, calculate, get an answer, then open another tool. No accounts, no training diary, no AI in the math.