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Running pace calculator

Pace and speed from a distance and a time, and what that pace predicts for other race distances.

Running pace calculator

Pace and speed from a distance and a time, and what that pace predicts for other race distances.

5:00
Pace per kilometre
8:03
Pace per mile
12 km/h (7.46 mph)
Speed
25:00
Predicted 5 km
52:07
Predicted 10 km
1:55:00
Predicted Half marathon
3:59:47
Predicted Marathon

Predictions use Riegel's formula (time x (distance ratio)^1.06). They assume equal training for the longer distance, which is why marathon predictions are optimistic.

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