Running Pace Calculator
Enter any two of distance, time and pace, and this gives you the third. The split table shows the elapsed time at each standard distance.
Your results
Even splits, which almost nobody runs. Real races involve pacing variation, terrain and fatigue.
Common pace reference points
- 6:00 /km — 10 km in 1:00:00, half marathon in 2:06.
- 5:00 /km — 10 km in 50:00, half in 1:45, marathon in 3:31.
- 4:30 /km — 10 km in 45:00, half in 1:35, marathon in 3:10.
- 4:00 /km — 10 km in 40:00, half in 1:24, marathon in 2:49.
- 3:00 /km — 10 km in 30:00. Close to elite for most amateurs.
A 4-hour marathon is 5:41 /km. A sub-2-hour half is 5:41 /km as well, which is a useful coincidence to remember.
Even pacing versus how races actually go
The split table assumes constant pace. In practice:
- Slightly negative splits — second half faster than the first — is the pacing strategy associated with best performances at most distances.
- Going out too fast is the commonest error, particularly in a first marathon. The time lost in the second half exceeds the time gained in the first.
- Terrain and wind mean constant pace is often the wrong target anyway; constant effort is better.
Common questions
What is a good 5 km pace?
Highly individual. 6:00/km is a solid recreational pace, 5:00/km is fit, and 4:00/km is competitive club level.
How do I convert pace per km to per mile?
Multiply by 1.609. The calculator does both.
Should I run even splits?
Even or slightly negative splits produce the best results. Starting fast rarely pays.
What pace for a 4-hour marathon?
5:41 per km, or 9:09 per mile.
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Track the numbers, not just calculate them
MyFitsy stores your weight, measurements and every session, so the figures above become a trend instead of a one-off.
