Running pace calculator

Work out your pace, finish time or distance: enter two and see the third. With your pace per kilometer or per mile, your speed and what your form predicts for 5K, 10K, the half and the full marathon.

What do you want to calculate?

PaceTimeDistance

Your distance

Your time

h:mm:ss

For example 25:30 or 1:52:00.

Your pace

5:30min/km

Speed: 10.9 km/h
Pace per mile: 8:51 min/mi
5K prediction: 26:23
15K prediction: 1:24:32
Half marathon prediction: 2:01:21
Marathon prediction: 4:13:01

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Pace and finish times in one table

Want to know what pace you need for a goal, such as a sub-hour 10K? Enter your distance and target time in the calculator, or find your target time in the table and read off your pace. It works the other way too: choose "Time" at the top and enter your pace.

Pace and finish time per distance
Pace (min/km)	Speed	5 km	10 km	Half	Marathon
4:00	15.0 km/h	20:00	40:00	1:24:23	2:48:47
4:30	13.3 km/h	22:30	45:00	1:34:56	3:09:53
5:00	12.0 km/h	25:00	50:00	1:45:29	3:30:59
5:30	10.9 km/h	27:30	55:00	1:56:02	3:52:04
6:00	10.0 km/h	30:00	1:00:00	2:06:35	4:13:10
6:30	9.2 km/h	32:30	1:05:00	2:17:08	4:34:16
7:00	8.6 km/h	35:00	1:10:00	2:27:41	4:55:22
7:30	8.0 km/h	37:30	1:15:00	2:38:14	5:16:28
8:00	7.5 km/h	40:00	1:20:00	2:48:47	5:37:34

How to work out your pace

pace (min/km) = time (minutes) / distance (km)

speed (km/h) = 60 / pace (min/km)

Example: 10 km in 55 minutes is 55 / 10 = 5.5 minutes per kilometer, so 5:30 min/km. That is 60 / 5.5 = 10.9 km/h. Note: 5.5 minutes is 5 minutes and 30 seconds, not 5 minutes and 50 seconds.

Predicting your finish time

The predictions come from Peter Riegel's formula (1981). It says that a race twice as long takes you a little more than twice as long, because your pace slowly drops:

new time = time × (new distance / distance) ^ 1.06

The prediction is most accurate between distances that are not too far apart and if you have also trained for the longer distance. Up to the half marathon it works well in research. For the marathon it is too optimistic for recreational runners: in a study of more than 2,300 runners it predicted a time at least 10 minutes too fast for half of them.

Frequently asked questions

What is a good running pace?

It depends on your experience and the distance. Many beginners run around 6:30 to 7:30 min/km, experienced recreational runners around 5:00 to 6:00. More important than a number is running your easy runs truly easy: you should still be able to talk.

What pace do I need for a sub-25-minute 5K?

Faster than 5:00 min/km on average, or 12 km/h or more.

How do I convert km/h to min/km?

Divide 60 by your speed. 12 km/h is 60 / 12 = 5 minutes per kilometer. The other way round: divide 60 by your pace in minutes.

Predicted finish times are estimates. Build up your distance gradually and listen to your body.

Sources

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