Running Pace Calculator
Work out your running pace or your finish time. Pick a race or enter any distance in miles or kilometers, then enter your time to get your pace, or your pace to get your time.
Your pace
9:39 /mi
Check the highlighted fields to see your result.
- Speed
- 6.21 mph
- Pace in the other unit
- 6:00 /km
Results are estimates for information only and do not constitute financial, medical, or legal advice.
How pace is calculated
Pace is your total time divided by the distance. The calculator also converts it to the other unit (per kilometer or per mile, where 1 mile = 1.609344 km) and gives your average speed.
The formulas
Pace = time ÷ distance
Time = pace × distance
Worked example
You run a 10K (10 km) in 55 minutes.
- In seconds: 55 × 60 = 3,300 seconds.
- Pace: 3,300 ÷ 10 = 330 seconds per km, which is 5:30 per km.
- Per mile: 330 × 1.609344 = 531 seconds, or 8:51 per mile. Speed: 10 ÷ 55 × 60 = 10.91 km/h.
Frequently asked questions
What's the difference between pace and speed?
Pace is how long it takes you to cover one unit of distance, like 9:39 per mile. Speed is how much distance you cover in an hour, like 6.2 mph. Runners usually talk about pace; the calculator shows both.
How long is each race?
A 5K is 5 km (3.11 miles), a 10K is 10 km (6.21 miles), a half marathon is 21.0975 km (13.11 miles), and a marathon is 42.195 km (26.22 miles).
Can I use it to plan a race?
Yes. Choose "My finish time," pick the race, and enter the pace you want to hold to see your finish time. Real races are rarely run at a perfectly even pace, so treat the result as a target.