Pace Calculator
Find your running pace per kilometre and average speed.
How to use the Pace Calculator
- Enter the distance you ran in kilometres.
- Enter your total time in minutes.
- See your pace per km and average speed.
Pace = time ÷ distance (min/km) · Speed = distance ÷ (time ÷ 60)
About the Pace Calculator
Enter a distance in kilometres and a time in minutes, and this returns your pace in minutes and seconds per kilometre, your average speed in km/h, and your pace per mile. Pace and speed are inverses — pace is time per distance, speed is distance per time — which is why the same effort reads as 6:00/km or 10 km/h depending on who is asking. Runners think in pace because it converts straight into a finish time, while cyclists think in speed; the speed calculator takes the same relationship from the other end.
One input detail catches people out: the time field takes decimal minutes, not minutes and seconds. A 25 minutes 30 seconds 5k is 25.5, not 25.3 — divide the seconds by 60. Get it wrong and the pace is quietly plausible but incorrect. Output is formatted mm:ss, so only the input needs converting.
The practical use is race targets: divide your goal time by the race distance and you have the pace to hold. A four-hour marathon is 240 minutes over 42.195 km, or about 5:41/km. Keep the km and mile figures straight, too — 5:00/km is 8:03/mile, so a pace sounding slow in one unit sounds fast in the other. The honest caveat: even pacing is a model. Hills, wind, heat and fatigue mean real races are rarely run at a flat split, and this average hides everything inside it. Pair it with the calorie calculator for the energy side.
Frequently asked questions
How do I enter a time like 25:30?
As decimal minutes: 25.5. Divide the seconds by 60 and add them to the minutes — 30 seconds is 0.5, 15 seconds is 0.25, 45 seconds is 0.75. Entering 25.3 would be read as 25 minutes 18 seconds.
What is the difference between pace and speed?
They are inverses of the same thing. Pace is time per distance (minutes per km), speed is distance per time (km per hour). Running 10 km/h is exactly 6:00/km. Neither is more correct — runners find pace easier because it multiplies straight into a finish time.
What is a good running pace?
There is no single answer worth quoting — it depends on your distance, age, training and goal, and the range across healthy runners is enormous. The useful comparison is your own pace over time on similar routes, not someone else's number.
How do I work out my race pace target?
Divide your goal time in minutes by the race distance in km and enter both here. For a sub-2-hour half marathon, that is 120 minutes over 21.0975 km — about 5:41/km. Then check whether you can actually hold it in training before race day.
Why is my pace per mile so different from my pace per km?
A mile is 1.609 km, so a mile pace is always about 61% larger. 5:00/km is 8:03/mile and 6:00/km is 9:39/mile. They describe identical running — mixing the two units up is a classic way to badly misjudge a race.