Half Marathon Pace Calculator
The pace per kilometre and per mile for any half-marathon target — for example 5:41/km (9:09/mile) for a 2-hour half. An exact pace calculation; fuel and pacing matter as much as fitness over 21.1 km.
Target time for a half marathon (21.1 km / 13.11 miles).
Your target time
::
Required pace
5:41 /km · 9:09 /mile
That is 10.55 km/h (6.55 mph). Hold this pace evenly — even pacing is the fastest way to hit a target time.
Split times (even pace)
| Distance | Time |
|---|---|
| 5 km | 28:26 |
| 10 km | 56:53 |
| 15 km | 1:25:19 |
| 20 km | 1:53:45 |
| 21.1 km | 2:00:00 |
Formula & source — Pace — exact arithmetic
Pace per km = total time ÷ distance in km. Pace per mile = total time ÷ distance in miles. Speed = distance ÷ time. These are exact calculations, not estimates — your splits will vary with hills, wind and pacing.
Estimate, not medical advice. FitCalc results are estimates based on population-average formulas. They are not a diagnosis, a prescription, or a substitute for professional medical advice. If you have a medical condition, are pregnant, or take medication, talk to a doctor or registered dietitian before changing your diet or exercise. FitCalc claims no medical credentials.
Try next: Pace Calculator · 5K Pace Calculator · 10K Pace Calculator