5:55 per km — marathon in 4:09:39, 10.14 km/h

Running 5:55 per kilometre is 10.14 km/h. Hold it and the half comes in at 2:04:50, the marathon at 4:09:39.

Finish times

These assume you hold the pace from gun to tape. Most runners drift slower in the second half, so leave a margin when setting a target.

5K: 29:35
10K: 59:10
Half: 2:04:50
Marathon: 4:09:39

Speed: 10.14 km/h
Metres per second: 2.817 m/s
Pace per mile: 9:31
One lap (400 m): 2:22

What this pace breaks

The cut-offs are tighter than they look: a sub-4 marathon needs 5:41 per kilometre, and one second slower puts you over four hours.

sub-20 min 5K · nosub-25 min 5K · nosub-30 min 5K · yessub-50 min 10K · nosub-60 min 10K · yessub-100 min Half · nosub-2h Half · nosub-3h Marathon · nosub-3:30h Marathon · nosub-4h Marathon · nosub-5h Marathon · yes

Nearby paces

Pace per km	Half	Marathon
5:50	2:03:04	4:06:08
5:51	2:03:25	4:06:50
5:52	2:03:46	4:07:33
5:53	2:04:07	4:08:15
5:54	2:04:29	4:08:57
5:55	2:04:50	4:09:39
5:56	2:05:11	4:10:21
5:57	2:05:32	4:11:04
5:58	2:05:53	4:11:46
5:59	2:06:14	4:12:28
6:00	2:06:35	4:13:10

The half and the full are not round numbers

A marathon is 42.195 km and a half is 21.0975 km. Rounding to 42 km costs you about a minute at a 5:00 pace — small, but enough to miss a target.

How to read this

Pace is the time for one kilometre, so a smaller number means faster.
To get speed, divide 3600 by the pace in seconds: 300 s gives 12 km/h.
A finish time is simply the pace multiplied by the distance.
Mile pace is kilometre pace times 1.609344.

Frequently asked questions

Q. What marathon time does 5:55 per km give?

4:09:39. The half comes in at 2:04:50, the 10K at 59:10 and the 5K at 29:35.

Q. How fast is 5:55 per km in km/h?

10.14 km/h, or 2.817 metres per second.

Q. What is that per mile?

9:31, because a mile is 1.609344 km.

Q. And one lap of the track?

2:22 for 400 m.