Pace Calculator
Find your pace, finish time, or distance. Fill in any two and leave the third blank (or choose what to calculate) — this tool solves for the missing value.
| Time | h m s |
| Distance | |
| Pace | m s per |
| Calculate |
Result
Your result will appear here.
Common race distances
| Race | Distance |
| 5K | 5 km (3.107 mi) |
| 10K | 10 km (6.214 mi) |
| Half marathon | 21.0975 km (13.109 mi) |
| Marathon | 42.195 km (26.219 mi) |
How it works
Pace relates distance, time, and speed for running/walking.
Formulas
- Pace = time / distance
- Time = pace × distance
- Distance = time / pace
Worked example
5 km in 25:00 is a pace of 5:00 per km (12 km/h).
For general information only. Actual performance varies with terrain, conditions, and fitness.
How to use the Pace Calculator
It takes a few seconds, and every figure is calculated in your browser.
- Enter the time.
- Enter the distance.
- Enter the pace.
- Choose what to calculate.
- Press Calculate — the result appears in the dark panel beside the form.
- Use Copy, CSV, Share or Print under the result if you want to keep it.
Pace Calculator — frequently asked questions
What formula does the Pace Calculator use?
Pace = time / distance Time = pace × distance Distance = time / pace
How does the Pace Calculator work?
Pace relates distance, time, and speed for running/walking.
Can you walk through a worked example?
5 km in 25:00 is a pace of 5:00 per km (12 km/h).
Last updated 10 November 2026 · Formula, worked example and assumptions are documented above, and every result is calculated in your browser.