Health
Running pace calculator
Enter a distance and how long it took. You get pace in both units, speed, and what that pace would mean over a marathon.
What this means
- You ran 5:30 per km, which is 8:51 per mile.
- Held for a full marathon (42.195 km), that pace finishes in 3:52:04. Most runners slow over longer distances.
What if
About this calculator
What this calculator does
It divides total time by distance to get pace, and distance by time to get speed. It shows both metric and imperial so you can compare race results.
How it is calculated
pace = total seconds / distance
speed = distance / hours
1 mile = 1.609344 km, marathon = 42.195 km
How to read the result
Pace is minutes and seconds per unit of distance. Lower pace is faster. Speed is the same information flipped around.
Sources and method
Standard arithmetic with no outside data. The formula is shown under How it is calculated, and unit tests check worked examples, including edge cases. A mile is exactly 1,609.344 meters.
Questions
What is the difference between pace and speed?
Pace is time per distance, such as 8:00 per mile. Speed is distance per time, such as 7.5 mph.
How long is a marathon?
42.195 kilometers, or about 26.2 miles.
Can I use this for walking or cycling?
Yes. The math is the same for any steady activity.
Why is the marathon time a guess?
It assumes you hold the same pace the whole way, which is hard over longer distances.