Projected finish times
Even-pace finish-time projection for standard race distances.
Finish time
Race Pace Calculator
Convert running pace, time, and distance into projected 5K, 10K, half marathon, and marathon finish times.
Pace5:00/km8:03/mile equivalent
10K projection50:00Even pace estimate
Marathon projection3:30:59Fatigue not modelled
Pace results
5K5 km at 5:00/km25:00
10K10 km at 5:00/km50:00
Half marathon21.1 km at 5:00/km1:45:29
Marathon42.2 km at 5:00/km3:30:59
Pace conversion
The same effort expressed as minutes per kilometre and minutes per mile.
Pace
Pace used
Minutes per km5:00/km
Minutes per mile8:03/mile
SourceUses the entered pace directlyKnown pace
Assumptions
Calculation notes
- Uses fixed race distances: 5K, 10K, half marathon 21.0975 km, and marathon 42.195 km.
- Does not apply fatigue curves, age grading, elevation adjustment, wind, temperature, trail surface, or training status.
- If calculating from a short effort, marathon and half-marathon projections can be optimistic.
Pace maths
How race times are projected
Race projections are even-pace benchmarks, useful for comparing targets before terrain and fatigue enter the picture.
Pace conversion
The calculator converts between pace, distance and time, then projects common race distances using even-pace maths.
It shows 5K, 10K, half-marathon and marathon equivalents so runners can compare training pace with race targets.
Race projectionpace x distance -> time; time / distance -> pace; selected pace projected across standard race distances
Target-pace example
Example: 5:00 per km pace
- Input mode: known pace
- Pace: 5 minutes per kilometre
Result: The output projects the same pace across 5K, 10K, half-marathon and marathon distances.
Even pace is a simple benchmark; terrain, fatigue, weather and training determine the real result.
Using the benchmark
- Use projections as training targets, not guarantees.
- Compare min/km and min/mile views if your plan or race uses a different unit.
Content reviewed: 7 September 2026.
Guide
Race Pace Calculator notes
Enter a running pace or a recent time and distance to estimate equivalent finish times for 5K, 10K, half marathon, and marathon distances.
FAQs
Race Pace Calculator FAQs
What is the Race Pace Calculator for?
Enter a running pace or a recent time and distance to estimate equivalent finish times for 5K, 10K, half marathon, and marathon distances.