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Race Time Predictor

Predict your finish time at any race distance using the Riegel endurance formula

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Hours

Minutes

Seconds

Predicted Times (Riegel Formula)

400m4:18/km
1:43
800m4:29/km
3:35
1 Mile4:40/km
7:31
10K5:13/km
52:07
15K5:20/km
1:20:07
Half Marathon5:27/km
1:55:00
Marathon5:41/km
3:59:47
50K5:44/km
4:47:02

Riegel endurance formula. Less accurate over very different distances.

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