Calculate running pace per kilometer or mile and average speed from a distance and an elapsed time.
Calculations happen locally. We do not send your values to our server.
5 km in 25 minutes is a pace of 5:00 per kilometer and a speed of 12 km/h. A half marathon of 21.0975 km in 2 hours averages 5:41 per kilometer, or 10.55 km/h, and 3.1 miles in 31 minutes is 10:00 per mile.
Pace is the total minutes divided by the distance, shown as minutes and seconds per kilometer or mile. Speed is the distance divided by the time in hours, so 10 km in 52 minutes is 5:12 per kilometer and 11.54 km/h. Seconds are rounded to the nearest whole second and a carry is handled properly: 4.001 km in 24 minutes is 5 minutes 59.9 seconds, displayed as 6:00 rather than 5:60.
Enter the total elapsed time, including stops at traffic lights or water stations, so the result is an average rather than your moving pace. Distance and time must both be greater than zero, and the figures describe the activity you entered; they do not predict a race result.
Type the distance, choose kilometers or miles, then enter hours and minutes for the whole activity. 5 km in 25 minutes is a pace of 5:00 per kilometer and a speed of 12 km/h. A half marathon of 21.0975 km finished in exactly 2 hours averages 5:41 per kilometer, or 10.55 km/h. If you stopped at traffic lights or water stations and kept the watch running, those pauses are included in the average, so the result can be slower than your moving pace.
Pace is time per distance, so a lower number is faster; speed is distance per hour, so a higher number is faster. 10 km in 52 minutes is 5:12 per kilometer and 11.54 km/h. In miles, 3.1 miles in 31 minutes is 10:00 per mile and 6 mph. Pace is shown to the nearest second: 4.001 km in 24 minutes works out to 5 minutes 59.9 seconds, so it is displayed as 6:00 rather than an impossible 5:60.
A marathon of 42.195 km in 3 hours 59 minutes averages 5:40 per kilometer. To plan a target, multiply your planned pace by the race distance and compare the finish time with a recent result before committing to a goal. GPS distances often differ slightly from certified course lengths, especially among tall buildings and on running tracks, so a watch may show a faster or slower pace than your official time implies. The calculator describes an average and does not predict how pace changes over longer distances.
| Input | Result |
|---|---|
5 km · 0 h 25 min | 5:00 /km · 12 km/h |
10 km · 0 h 52 min | 5:12 /km · 11.54 km/h |
21.0975 km · 2 h 0 min | 5:41 /km · 10.55 km/h |
42.195 km · 3 h 59 min | 5:40 /km · 10.59 km/h |
3.1 mi · 0 h 31 min | 10:00 /mi · 6 mi/h |
4.001 km · 0 h 24 min | 6:00 /km · 10 km/h |
Pace is time per distance, so a smaller number is faster; speed is distance per hour, so a larger number is faster. They are inverses: 5:00 per kilometer is 12 km/h, and 10:00 per mile is 6 mi/h. Runners usually plan in pace, while bikes and treadmills usually display speed.
Enter the race distance with your target time to see the pace it needs. A marathon of 42.195 km in 3 hours 59 minutes needs 5:40 per kilometer, and a half marathon of 21.0975 km in 2 hours needs 5:41. Compare that pace with a recent training run before committing to the goal.
GPS distance and official course distance rarely match exactly. Tall buildings, tree cover and running in outer lanes on a track all change the recorded distance, and a watch updates pace continuously instead of averaging the whole activity. Use the official distance and the total time for a comparable figure.
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