Running pace calculator

Enter a distance and a finish time to get your pace per kilometre and per mile.

Distance

Finish time

Hours Minutes Seconds

Your pace

5:00/km

Per mile

8:03 /mi

Speed

12.0 km/h

Same pace over

5K25:00

10K50:00

Half1:45:29

Marathon3:30:59

Holding the same pace is not a prediction

Pace slows as distance grows. For a realistic finish time at a longer race, use the race predictor.

Race time predictor

Easy days should feel easy

Most of your running belongs in zone 2. Find your zones from max and resting heart rate.

Heart rate zone calculator

Let the plan set your paces

RunBuddy sets a pace for every session from your recent runs and sends it to your Apple Watch.

See a sample plan

How pace is calculated

Pace is time divided by distance. A 50:00 finish over 10 km is 3,000 seconds ÷ 10 km = 300 seconds per kilometre, or 5:00 /km. Speed is the same number the other way round: 3,600 seconds in an hour ÷ 300 seconds per kilometre = 12.0 km/h.

To get pace per mile, multiply the pace per kilometre by 1.609344, because one mile is 1.609344 km. To go back, divide by 1.609344. The calculator does this on every keystroke and rounds to the nearest second.

Worked example: a 3:30 marathon

A marathon is 42.195 km. 3:30:00 is 12,600 seconds, and 12,600 ÷ 42.195 = 298.6 seconds per kilometre, which rounds to 4:59 /km. Multiply by 1.609344 and you get 480.6 seconds, or 8:01 /mi. That pace is 12.1 km/h.

Min/km to min/mile conversion table

Find your pace per kilometre in the first column. The other columns show the same pace per mile, as speed, and as a finish time over each race distance.

Min/km	Min/mile	km/h	5K	10K	Half	Marathon
3:30	5:38	17.1	17:30	35:00	1:13:50	2:27:41
3:45	6:02	16.0	18:45	37:30	1:19:07	2:38:14
4:00	6:26	15.0	20:00	40:00	1:24:23	2:48:47
4:15	6:50	14.1	21:15	42:30	1:29:40	2:59:20
4:30	7:15	13.3	22:30	45:00	1:34:56	3:09:53
4:45	7:39	12.6	23:45	47:30	1:40:13	3:20:26
5:00	8:03	12.0	25:00	50:00	1:45:29	3:30:59
5:15	8:27	11.4	26:15	52:30	1:50:46	3:41:31
5:30	8:51	10.9	27:30	55:00	1:56:02	3:52:04
5:45	9:15	10.4	28:45	57:30	2:01:19	4:02:37
6:00	9:39	10.0	30:00	1:00:00	2:06:35	4:13:10
6:15	10:04	9.6	31:15	1:02:30	2:11:52	4:23:43
6:30	10:28	9.2	32:30	1:05:00	2:17:08	4:34:16
6:45	10:52	8.9	33:45	1:07:30	2:22:24	4:44:49
7:00	11:16	8.6	35:00	1:10:00	2:27:41	4:55:22
7:15	11:40	8.3	36:15	1:12:30	2:32:57	5:05:55
7:30	12:04	8.0	37:30	1:15:00	2:38:14	5:16:28

Pace needed for common goal times

These are the average paces that finish exactly on the goal time. Aim a few seconds per kilometre faster to leave a margin.

Goal	Pace per km	Pace per mile
Sub-20 5K	4:00 /km	6:26 /mi
Sub-25 5K	5:00 /km	8:03 /mi
Sub-50 10K	5:00 /km	8:03 /mi
Sub-1:00 10K	6:00 /km	9:39 /mi
Sub-1:45 half marathon	4:59 /km	8:01 /mi
Sub-2:00 half marathon	5:41 /km	9:09 /mi
Sub-3:30 marathon	4:59 /km	8:01 /mi
Sub-4:00 marathon	5:41 /km	9:09 /mi

Training for one of these? See the half marathon plan, the 10K plan or the marathon plan.

Questions

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

Multiply your pace per kilometre by 1.609344. For example, 5:00 /km is 300 seconds × 1.609344 = 483 seconds, or 8:03 /mi. To convert the other way, divide by 1.609344.

How do I calculate running pace?

Divide your total time in seconds by the distance in kilometres. A 25:00 5K is 1,500 ÷ 5 = 300 seconds per kilometre, so 5:00 /km.

What pace do I need for a sub-2 hour half marathon?

You need an average of 5:41 /km, which is 9:09 /mi. The distance is 21.0975 km, so 7,200 seconds ÷ 21.0975 = 341 seconds per kilometre.

What pace is a 4 hour marathon?

Also 5:41 /km or 9:09 /mi. A marathon is exactly twice the half marathon distance, so doubling the time keeps the pace the same.

Can I use my 5K pace for a marathon?

No. Pace slows as distance grows, so holding 5K pace for 42 km is not realistic. Use the race time predictor for a finish time that allows for it.