Race Time Predictor
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How race time prediction works
This predictor uses Peter Riegel's formula, which scales a known race time to a new distance with an endurance exponent of 1.06. It is most accurate when your training supports the target distance.
Frequently asked questions
- How accurate is the race time predictor?
- The Riegel formula is a good estimate for well-trained runners, but longer distances need specific endurance training to hit the predicted time.
- Which result should I enter?
- Use a recent, all-out race result for the most realistic prediction.