Running Pace Calculator — km or mi, Free | How to use and interpret results
Find pace from distance and elapsed time, or estimate finish time from a chosen pace. Per-kilometre and per-mile views help compare training records using different units.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
Used when solving for pace. A single number is minutes.
Used when solving for finish time. Per kilometre or per mile, matching the unit above.
How to use this tool
Choose pace or time mode and check the distance unit. Use colon-separated time fields; a lone number is interpreted as minutes rather than seconds.
Results and examples
5 km in 25 minutes gives 5 minutes per kilometre and 12 km/h. Holding that pace over 10 km gives 50 minutes arithmetically, before fatigue and course effects.
Worked example
5 km in 25 minutes gives 5 minutes per kilometre and 12 km/h. Holding that pace over 10 km gives 50 minutes arithmetically, before fatigue and course effects.
Limitations
- Elevation, wind, stops and GPS error are not corrected.
- Constant-pace arithmetic is not an exercise prescription or a finish-time guarantee.
Fields
| Field | Guidance and constraints |
|---|---|
| Solve for | Pace from distance + time / Finish time from distance + pace |
| Distance | Accepted range: 0.01–500 · Input step: 0.01 |
| Distance unit | Kilometres / Miles |
| Elapsed time (h:mm:ss or mm:ss) | Used when solving for pace. A single number is minutes. |
| Pace per unit (mm:ss) | Used when solving for finish time. Per kilometre or per mile, matching the unit above. |
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 pace is 5 km in 25 minutes?
5 km in 25 minutes gives 5 minutes per kilometre and 12 km/h. Holding that pace over 10 km gives 50 minutes arithmetically, before fatigue and course effects.
Will the estimated finish time be my actual result?
Elevation, wind, stops and GPS error are not corrected. Constant-pace arithmetic is not an exercise prescription or a finish-time guarantee.
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