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Race Finish Time Predictor

Predict your 10K, half marathon and marathon times from any known race result using the Riegel formula. Get pace targets, runner level classification and qualifying standards.

Riegel FormulaAll Distances
🏅 Your Known Race
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Enter your actual race time — not a training run
📐 Riegel Formula: T2 = T1 × (D2/D1)^1.06
Higher exponent (1.06) means longer races get proportionally harder. Best used within 4× distance range.
📊 Predicted Race Times
Runner Level & Standards
Category5K Time10K TimeHalf MarathonMarathon

FAQs — Race Time Predictor