Running Pace Calculator
Pace tells you how long each kilometre or mile takes. Enter the distance you ran and your time, and this calculator gives your pace per kilometre and per mile, your speed in km/h, and how long common race distances would take at the same pace.
Last reviewed:
- Pace per kilometre
- 5:30 min/km
- Pace per mile
- 8:51 min/mile
- Speed
- 10.91 km/h
- Projections assume an even pace. Longer races are usually slower than a short-race pace suggests.
Projected times at this pace
| Distance | Time |
|---|---|
| 5 km | 0:27:30 |
| 10 km | 0:55:00 |
| Half marathon (21.0975 km) | 1:56:02 |
| Marathon (42.195 km) | 3:52:04 |
It is useful for setting race targets, planning training runs and comparing runs of different lengths.
How to use this calculator
- Enter the distance in kilometres.
- Enter your time in hours, minutes and seconds.
- Read your pace per kilometre and per mile and your speed.
- Check the projected race times in the table.
Formula and variables
Pace per km = Total time ÷ Distance Pace per mile = Pace per km × 1.609344 Speed (km/h) = 3600 ÷ Pace per km in seconds
- Total time - hours, minutes and seconds converted to seconds.
- 1.609344 - kilometres in a mile.
Projected times multiply your pace by each race distance.
Worked example
A runner completes 10 km in 55 minutes.
| Distance | 10 km |
|---|---|
| Time | 55 minutes |
| Pace per km | 5:30 |
| Pace per mile | 8:51 |
| Speed | 10.91 km/h |
| Projected 5 km | 27:30 |
- 55 minutes = 3,300 seconds, and 3,300 ÷ 10 = 330 seconds per km, or 5:30.
- 330 × 1.609344 = 531 seconds per mile, or 8:51.
- Speed = 3,600 ÷ 330 = 10.91 km/h.
What changes the result
- Terrain and weather. Hills, heat and wind slow your pace.
- Race distance. Most people cannot hold a 5K pace for a marathon.
- Fitness and training. Pace improves with consistent training.
Benefits and practical uses
- Set realistic race targets.
- Compare runs of different distances.
- Convert between km and mile pace.
Assumptions and limitations
- An even pace for the whole distance.
- The time is the moving time you enter.
- Projected race times are estimates, not predictions.
Frequently asked questions
How is running pace calculated?
Divide your total time by the distance. For example, 55 minutes for 10 km is 5 minutes 30 seconds per km.
What is a good running pace?
It depends on age, fitness and the distance. Compare yourself with your own earlier runs.
How do I convert min/km to min/mile?
Multiply the pace by 1.609344. A 5:30 per km pace is about 8:51 per mile.
Can I predict my marathon time from a 10K?
A straight multiplication is optimistic because fatigue slows you down over longer distances. Treat it as an upper-end estimate.
Does it work for walking and cycling?
Yes, for pace and speed. The race projections are meant for running.
References
Page last reviewed on . This calculator gives estimates for planning only; it is not financial advice and not an offer from any lender.