Race Time Predictor
Calculate your potential race times across different distances using Riegel's endurance formula - a proven mathematical model trusted by coaches and athletes worldwide.
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This calculator uses Riegel's endurance formula:
T2 = T1 × (D2/D1)1.06
Where:
- T1 = Time for your known distance
- D1 = Known distance
- T2 = Predicted time for new distance
- D2 = New distance
- 1.06 = Fatigue factor