Running Pace | How to use and interpret results
Calculate per-kilometre pace and average speed from kilometres and separate hour/minute/second fields. Additional race-distance times assume the same pace throughout.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Loading the tool. If it does not appear, reload this page.
How to use this tool
Enter the distance in km and elapsed time in the three fields. Decide whether stops are included and keep that convention consistent when comparing records.
Results and examples
5 km in 25 minutes gives 5:00/km and 12 km/h. The 50-minute 10K projection is a constant-pace multiplication, not a guarantee of no fatigue over a longer distance.
Worked example
5 km in 25 minutes gives 5:00/km and 12 km/h. The 50-minute 10K projection is a constant-pace multiplication, not a guarantee of no fatigue over a longer distance.
Limitations
- No race model for elevation, temperature or fatigue is used.
- GPS distance and pause-time accuracy are not audited.
Fields
| Field | Guidance and constraints |
|---|---|
| Distance (km) | Check the unit and format displayed beside this field. |
| Distance preset | Check the unit and format displayed beside this field. |
| Time (hours) | Check the unit and format displayed beside this field. |
| Min | Check the unit and format displayed beside this field. |
| Sec | Check the unit and format displayed beside this field. |
| Estimated finish | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What 10K time follows from 5 km in 25 minutes?
5 km in 25 minutes gives 5:00/km and 12 km/h. The 50-minute 10K projection is a constant-pace multiplication, not a guarantee of no fatigue over a longer distance.
Can I rely on the half/full projections as performance predictions?
No race model for elevation, temperature or fatigue is used. GPS distance and pause-time accuracy are not audited.
