Calculator
Running pace calculator
Choose what to solve: average pace from time and distance, time from pace, or distance from time. Race presets simplify planning, while cumulative splits assume even pacing. This is time arithmetic, not a performance prediction.
Calculator
Enter data
Two of time, pace and distance, plus the split interval. Fields marked with an asterisk are required.
How to use the calculator
- Choose the unknown. In a two-part time the first number is minutes, for example 50:00.
- Inspect the splits. The last row always shows the finish, including a partial kilometre.
Calculation details
Formula and calculation method
Pace (s/km) = seconds / kilometres. Time = pace × distance; distance = time / pace; speed = 3600 / pace. Total seconds round before being split into minutes and seconds.
Worked example
10 km in 50:00 gives 5:00 min/km and 12 km/h. At even pace, 5 km is reached in 25:00 and the finish in 50:00.
Limitations
- No stops, elevation, fatigue, weather or GPS-error model. Up to 500 km, 7 days and 100 splits; these are interface limits.
Sources
Engine version: 2.0 (2026-09-22) · Last reviewed: 22 September 2026
Frequently asked questions
Is 4:60 a valid pace?
No: it is 5:00. Rounded 60 seconds carry into the next minute. Entered seconds must be 00–59.
Are splits the time for each segment?
The table shows cumulative time since the start. Segments are equal except for a possibly shorter final segment.