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Race Time Predictor

Predict your race time based on a recent performance.

Recent Race Distance

Finish Time

Predict For

Estimated Finish

52m 7s

Pace: 5:13/km

This tool uses Riegel's Formula, widely accepted as the standard for race time prediction.

T2 = T1 × (D2 / D1)^1.06

Note: Predictions become less accurate as the difference between the two distances increases (e.g., predicting a Marathon from a 100m sprint).