Half Marathon Pace Calculator
Turn your goal time into the exact pace per kilometre and per mile you need to hold over 21.0975 km, or enter your pace to predict your finish time.
Calculate Your Half Marathon Pace
Choose whether you know your goal finish time or your target pace. The calculator shows your pace, speed and even-pace splits for the full 13.1 miles.
Pace Calculator
Half marathon distance: 21.0975 km / 13.109 miles
Understanding Your Pace
How to use your numbers on race day
Pick a Realistic Goal
Base your target on recent race results or a hard, recent training run rather than a hopeful guess.
Know Your Units
Races often mark kilometres or miles. Check both paces so you can read your watch and the course signs with confidence.
Use the Splits
Note your 5K split times on your wrist or a pace band so you can check progress at each marker.
Adapt to Conditions
Heat, hills and wind affect effort. Hold your target effort first and let the pace flex a little.
Half Marathon Pace Chart
Average pace needed for common half marathon finish times, rounded to the nearest second.
| Finish Time | Pace per km | Pace per Mile | Typical Goal |
|---|---|---|---|
| 1:20:00 | 3:48 | 6:06 | Fast club runner |
| 1:30:00 | 4:16 | 6:52 | Strong amateur |
| 1:45:00 | 4:59 | 8:01 | Experienced recreational runner |
| 2:00:00 | 5:41 | 9:09 | Popular sub-2 target |
| 2:15:00 | 6:24 | 10:18 | Steady, comfortable finish |
| 2:30:00 | 7:07 | 11:27 | First-timer or run/walk plan |
Half Marathon Pace FAQ
Answers to common questions about half marathon pacing and finish times.
Enter your target finish time and the calculator divides it by the half marathon distance of 21.0975 km (13.109 miles) to give your pace per kilometre and per mile. You can also enter a pace and it will predict your finish time. It also shows your average speed and splits at 5K intervals.
A half marathon is exactly half the length of a full marathon: 21.0975 kilometres, which is about 13.1 miles.
To finish in 2 hours you need to average roughly 5:41 per kilometre, or about 9:09 per mile.
A good time depends on your age, experience and fitness. Many recreational runners aim to finish between 1:45 and 2:15, while first-timers often just aim to finish comfortably. Compare yourself with your own previous results rather than other runners.
Even pacing is a common and reliable strategy because it avoids going out too fast and slowing late in the race. Hills, wind and crowded starts can change your ideal pace, so treat the calculator’s splits as a guide and adjust by effort.