Pace from a 10K finish time
- Input
- Distance = 10 km, Time = 50:00
- Working
- Pace = 3000 s ÷ 10 km = 300 s per km, written 5:00/km. Per mile the same effort is 300 × 1.609344 = 482.8 s, written 8:03/mile.
- Result
- Pace = 5:00 per km (8:03 per mile)
Running Pace Calculator
Work out running pace, finish time or distance from any two of the three — with an even split table per kilometre or mile for your race distance. Runs entirely in your browser — your numbers never leave this device.
Solve for
Distance unit
Pace
5:00 /km
5:00 per km · 8:03 per mile
Split table per
- Distance
- 10 km
- Finish time
- 0:50:00
| Km | Split | Cumulative |
|---|---|---|
| 1 | 0:05:00 | 0:05:00 |
| 2 | 0:05:00 | 0:10:00 |
| 3 | 0:05:00 | 0:15:00 |
| 4 | 0:05:00 | 0:20:00 |
| 5 | 0:05:00 | 0:25:00 |
| 6 | 0:05:00 | 0:30:00 |
| 7 | 0:05:00 | 0:35:00 |
| 8 | 0:05:00 | 0:40:00 |
| 9 | 0:05:00 | 0:45:00 |
| 10 | 0:05:00 | 0:50:00 |
How it works
Pace = time ÷ distance | Time = pace × distance | Distance = time ÷ pace | 1 mile = 1.609344 km exactly, so pace per mile = pace per km × 1.609344
Pace, time and distance are three views of one relationship, so fixing any two decides the third: pace is time divided by distance, time is pace multiplied by distance, and distance is time divided by pace. This calculator solves whichever one you leave out and shows the answer in both unit systems — a 5:00 per kilometre pace is the same effort as 8:03 per mile, because a mile is 1.609344 kilometres and the pace per mile is the pace per km multiplied by that factor.
The split table assumes an even pace: every kilometre (or mile) takes the same time, so each split is the pace multiplied by the split length and the cumulative column is a running total. Real races are rarely run that evenly — hills, wind, crowds and a finishing kick all move individual splits — which is what the Race Split Calculator is for. Here, the even table is the honest baseline every plan is measured against, and it handles races that are not a whole number of units: a marathon's last split is the final 0.195 km, timed at the same pace.
Times are entered as mm:ss or hh:mm:ss and distances in kilometres or miles. Everything is worked at full precision and rounded only for display, so a pace shown as 4:59 per km over a half marathon reproduces the finish time you entered rather than drifting by a second or two.
Worked examples
Marathon time from a target pace
- Input
- Pace = 5:30 per km, Distance = 42.195 km (marathon)
- Working
- Time = 330 s × 42.195 = 13,924.35 s, which formats as 3:52:04. The split table shows each kilometre at 5:30 with the short final split covering the last 0.195 km.
- Result
- Finish time = 3:52:04
Distance covered at a steady pace
- Input
- Time = 45:00, Pace = 6:00 per km
- Working
- Distance = 2700 s ÷ 360 s per km = 7.5 km exactly.
- Result
- Distance = 7.5 km
Frequently asked questions
What is a good running pace?
It depends entirely on the runner and the distance — pace only means something relative to a person and an event. For reference, the worked examples on this page are realistic mid-pack figures: 5:00/km over 10 km (a 50:00 finish) is a solid club-runner time, and 6:00/km is a common steady training pace. Compare your pace against your own previous results at the same distance, not against a universal chart.
How do I convert pace per km to pace per mile?
Multiply by 1.609344, the exact number of kilometres in a mile. A 5:00/km pace (300 s) becomes 482.8 s, shown as 8:03 per mile. The reverse conversion divides by the same factor. This page always shows both, so no manual conversion is needed.
Why is the last split in the table shorter than the others?
Because most race distances are not a whole number of kilometres or miles. A marathon is 42.195 km, so after 42 full kilometres a final 0.195 km remains; it is timed at the same pace (about 58 seconds at 4:59/km) rather than being stretched into a full unit, and the cumulative column still lands exactly on your finish time.
Should I aim for perfectly even splits?
Even pacing is the most efficient baseline for flat courses and the easiest plan to execute, which is why this table uses it. Many runners prefer a negative split — a slightly slower first half and faster second — and the Race Split Calculator builds that table. Either way, the average pace must equal the figure this calculator gives you; the strategies only redistribute it.
How do I enter a time like 1 hour 45 minutes?
Type it as 1:45:00 (hours:minutes:seconds) or as 105:00 (minutes:seconds) — both are read as the same 6,300 seconds. A pace is typed the same way: 5:30 means five minutes thirty seconds per unit.
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