Race Time Predictor

Predict race times from a known result using the Riegel formula for common race distances

Enter a recent race result and predict times for other distances using the Riegel formula: T2 = T1 x (D2/D1)^1.06

Known Distance

Finish Time (HH:MM:SS)

: :

Riegel Exponent

Standard: 1.06. Higher = more fatigue for longer races.

Distance	Predicted Time	Pace /km	Pace /mi

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