4:12 per km — marathon in 2:57:13, 14.29 km/h

Running 4:12 per kilometre is 14.29 km/h. Hold it and the half comes in at 1:28:37, the marathon at 2:57:13.

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: 21:00
10K: 42:00
Half: 1:28:37
Marathon: 2:57:13

Speed: 14.29 km/h
Metres per second: 3.968 m/s
Pace per mile: 6:46
One lap (400 m): 1:41

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

Nearby paces

Pace per km	Half	Marathon
4:07	1:26:51	2:53:42
4:08	1:27:12	2:54:24
4:09	1:27:33	2:55:07
4:10	1:27:54	2:55:49
4:11	1:28:15	2:56:31
4:12	1:28:37	2:57:13
4:13	1:28:58	2:57:55
4:14	1:29:19	2:58:38
4:15	1:29:40	2:59:20
4:16	1:30:01	3:00:02
4:17	1:30:22	3:00:44

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 4:12 per km give?

2:57:13. The half comes in at 1:28:37, the 10K at 42:00 and the 5K at 21:00.

Q. How fast is 4:12 per km in km/h?

14.29 km/h, or 3.968 metres per second.

Q. What is that per mile?

6:46, because a mile is 1.609344 km.

Q. And one lap of the track?

1:41 for 400 m.