Running Pace Calculator
Use this calculator to convert any run distance and finish time into pace per mile, pace per kilometer, mph, and kph.
Last updated: May 30, 2026
Pace
08:02 / mi · 05:00 / km
Speed
7.46 mph · 12 kph
Formula
Pace = total time / distance. Speed = distance / time.
Best Use
Comparing training runs, planning race targets, and converting between mile and kilometer pace.
Limitations
The arithmetic is exact for the values entered, but GPS distance, treadmill calibration, and manual time entry can still introduce measurement error.
Example
A 10 km run in 50:00 equals 5:00 per km, about 8:03 per mile, 12.0 kph, or 7.46 mph.
How to Use It
- Enter the distance you ran or plan to run.
- Choose miles or kilometers.
- Enter the total time to calculate pace and speed in both unit systems.
Common Mistakes
- Mixing chip time, moving time, and elapsed time in the same comparison.
- Using GPS distance from a route with poor signal without checking the actual race distance.
- Comparing treadmill pace to outdoor pace without accounting for calibration and conditions.
Useful For
- Set a realistic race target before using the race time predictor.
- Convert a workout prescribed in miles into kilometer pace.
- Check whether a tempo run stayed within the intended pace range.
How do I calculate running pace?
Divide total running time by distance. For example, 50 minutes over 10 kilometers is 5 minutes per kilometer.
Is pace per mile different from pace per kilometer?
Yes. Pace per mile is the time needed to run one mile, while pace per kilometer is the time needed to run one kilometer.
Why does my watch pace differ from this calculator?
This calculator uses the exact numbers entered. Watch pace can differ because of GPS smoothing, auto-pause, signal quality, and route measurement.