Running Speed Calculator: Pace to km/h, mph and Race Times
Convert your running pace to speed, or speed to pace, and see what that means for 5K, 10K, half marathon and marathon finish times.
- Nothing you type is stored
- Free
- No signup
Your speed
10km/h
- Speed in mph
- 6.21 mph
- Speed in m/s
- 2.78 m/s
- Pace per km
- 6:00 min/km
- Pace per mile
- 9:39 min/mile
An estimate for general information, not medical advice.
Race finish times at this speed
| Race | Finish time |
|---|---|
| 5 km | 30:00 |
| 10 km | 1:00:00 |
| 21.1 km | 2:06:35 |
| 42.2 km | 4:13:10 |
How to use
- Choose to start from pace or from speed.
- Enter your pace (mm:ss per km or mile) or speed in km/h.
- Read the speed, pace and race finish times.
Good to know
Speed in km/h = 60 ÷ pace in minutes per km. A 6:00/km pace is 10 km/h; 5:00/km is 12 km/h; 4:00/km is 15 km/h.
Treadmills in India usually show km/h, while many running apps show pace. This tool lets you switch between the two, for example to set a treadmill for a target race pace.
Race times assume you can hold the same speed for the whole distance, which gets harder as races get longer. For a realistic marathon estimate from a shorter race, use the race time predictor.
Questions
What is 10 km/h in pace?
6:00 minutes per km, or about 9:39 per mile.
How fast is an average jog?
Easy jogging for most adults is about 7–10 km/h (6:00–8:30 per km).
What treadmill speed matches a 5:30 pace?
About 10.9 km/h. Many runners add a 1% incline to mimic outdoor effort.
How do I convert mph to km/h?
Multiply by 1.609. 6 mph is about 9.7 km/h.
Why do the race times look fast?
They assume an even pace for the whole race. Most people slow down over longer distances.