Running Pace Calculator

What the Running Pace Calculator does

Pace is time divided by distance. From one run’s distance and time you can find pace per kilometre and per mile, speed, and the finish time at that pace for other races. The Riegel formula adjusts race predictions for the slowing that happens over longer distances.

Formula

• Pace = time ÷ distance
• Speed = distance ÷ time
• Riegel prediction: T2 = T1 × (D2 ÷ D1)^1.06

Worked example

Using the starting values in the calculator above:

How to read the result

Race predictions assume similar training for each distance; marathon predictions from short races are often optimistic without long-run training.

Easy runs are usually 60 to 90 seconds per kilometre slower than race pace.

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