Your time. Your pace in one click.
Enter your race distance and actual or estimated time to find your average speed in km/h and pace per kilometre. Then calculate a split time over any distance, including a 400 m lap of the track.
Standard race distances: a marathon is 42,195 m and a half marathon is 21,097.5 m.
How do you calculate average speed?
Divide the distance covered by the time it took. Make sure you use matching units before calculating.
- For a result in km/h: distance in kilometres ÷ duration in hours.
- For a result in m/s: distance in metres ÷ duration in seconds.
To convert m/s to km/h, multiply by 3.6. This comes from the ratio of 3,600 seconds in an hour to 1,000 metres in a kilometre. To convert back, divide by 3.6.
Example: 10 km in 40 minutes
40 minutes is 2,400 seconds. The calculation is 10,000 ÷ 2,400 × 3.6 = 15 km/h. Your pace is 4:00 min/km.
Speed or pace: two ways to read your effort
Runners often talk about pace rather than speed. Pace tells you how long it takes to cover one kilometre: 4:00 min/km means four minutes for each kilometre. At that pace, you cover 15 km in an hour, which is 15 km/h.
If your watch shows 5:27/km, that means five minutes and twenty-seven seconds per kilometre, or about 11.0 km/h. A shorter time per kilometre means a higher speed.
| Pace (min/km) | Speed (km/h) |
|---|---|
| 3:00 | 20 |
| 4:00 | 15 |
| 5:00 | 12 |
| 6:00 | 10 |
| 8:00 | 7.5 |
| 10:00 | 6 |
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