50-minute 10K split times
A 50-minute 10K needs an even pace of 5:00 per kilometre, or about 8:03 per mile. Each kilometre checkpoint lands exactly five minutes after the last, so halfway is 25:00 and the tenth kilometre is 50:00.
The complete even-pace split sheet
| 1 | 1 km | 1 km | 5:00 | 5:00 |
| 2 | 2 km | 1 km | 5:00 | 10:00 |
| 3 | 3 km | 1 km | 5:00 | 15:00 |
| 4 | 4 km | 1 km | 5:00 | 20:00 |
| 5 | 5 km | 1 km | 5:00 | 25:00 |
| 6 | 6 km | 1 km | 5:00 | 30:00 |
| 7 | 7 km | 1 km | 5:00 | 35:00 |
| 8 | 8 km | 1 km | 5:00 | 40:00 |
| 9 | 9 km | 1 km | 5:00 | 45:00 |
| 10 | 10 km | 1 km | 5:00 | 50:00 |
An estimate, not medical advice. Body metrics are population averages and do not account for your individual circumstances. Speak to a clinician about anything that matters.
The average speed is exactly 12 kilometres per hour.
Five kilometres is the halfway distance and the halfway time is 25:00.
The downloadable table contains every kilometre rather than only the headline pace.
How it works
The formula
totalMetres = distanceKm x 1,000
totalSeconds = finishMinutes x 60
secondsPerMetre = totalSeconds / totalMetres
pacePerKm = secondsPerMetre x 1,000
pacePerMile = secondsPerMetre x 1,609.344
splitCount = ceiling(totalMetres / chosenSplitMetres)
checkpointDistance[n] = min(n x chosenSplitMetres, totalMetres)
checkpointTime[n] = totalSeconds x checkpointDistance[n] / totalMetres
Every checkpoint uses the unrounded totals. Displayed times are rounded only
after the checkpoint has been calculated.
What it assumes
- The sheet is an even mathematical pace from start to finish. It does not model hills, wind, congestion, aid stations, warm-up, fatigue or a deliberate negative split.
- Distance arrives in kilometres. The measurement-system switch converts miles at the input boundary, so the formula receives one base unit whichever control the visitor sees.
- One international mile is exactly 1,609.344 metres. A track-lap row is 400 metres; a real runner in an outside lane travels farther unless the start is staggered.
- Each displayed clock is rounded independently to the nearest second. Adding those rounded split labels can differ from the exact finish by a few seconds, so cumulative checkpoints come from the unrounded total instead.
- This is a planning aid, not medical or coaching advice. A target can be mathematically consistent and still be unsuitable for a particular runner.
Common questions
What 400 metre lap time matches a 50-minute 10K?
Even pacing gives 2:00 per 400 metres. A standard 400 metre track therefore takes 25 laps for 10 kilometres, with no partial final lap.
Is 8:02 per mile exact for this target?
It is rounded to the nearest second. The exact average is about 482.8 seconds per international mile, which displays as 8 minutes 3 seconds when each pace is independently rounded.
Sources
The full method, worked example and every assumption behind this figure are on Running Split Planner.