Running Pace Calculator

Enter a distance and how long it took. See your pace per km and per mile, your average speed, and what that pace means over other race distances.

Your details

h:mm:ss

Type the time as h:mm:ss or mm:ss, for example 1:45:30 or 25:00.

Your results

Pick a distance and enter your time to see your pace.

How to use it

  1. Choose km or miles, then pick a race distance or choose Other distance and type your own.
  2. Enter your time as h:mm:ss or mm:ss, for example 1:52:30 or 24:15.
  3. Read your pace. The table shows how long each standard distance takes at that same pace.

How it's calculated

Pace. Time divided by distance:

pace = time ÷ distance

A 10K in 50:00 is 3,000 seconds ÷ 10 km = 300 seconds, so 5:00 per km. Per mile, divide by the distance in miles (10 km is 6.21 mi), which gives 8:03 per mile.

Speed. Distance divided by time in hours. 10 km in 50 minutes is 10 ÷ (50 ÷ 60) = 12 km/h.

Distances. The calculator uses the official road race distances: 21.0975 km for the half marathon and 42.195 km for the marathon (World Athletics), and the international mile of 1.609344 km.

Limits. The table assumes you hold the same pace for every distance. That’s useful for pacing a race, but not a prediction: most people slow down as the distance grows. For a prediction, use the Running Time Predictor.

Sources

  1. World Athletics. Half marathon: a road race of 21.0975 km, exactly half the marathon distance of 42.195 km.

Questions

How do I calculate my running pace?

Divide your time by the distance. A 5K in 25 minutes is 25 ÷ 5 = 5 minutes per km. For pace per mile, divide by the distance in miles instead, or multiply your pace per km by 1.609.

Is the table a race prediction?

No. It shows how long each distance takes at exactly the same pace. Over longer races most people slow down, so use the Running Time Predictor for a realistic race estimate.

What is a good pace for a beginner?

Any pace you can keep up while still breathing steadily is a good start. Most of your running should feel easy enough to talk in sentences.

How do I convert pace to speed?

Divide 60 by your pace in minutes. A 5:00 per km pace is 60 ÷ 5 = 12 km/h. The calculator shows both.

Updated November 9, 2026.