Race Time Predictor
Predict times across distances using Riegel's formula.
About this tool
Enter a known race time at a base distance — get predicted times at 5 km, 10 km, half marathon and marathon distances using the Riegel exponent.
Predict times across distances using Riegel's formula.
Enter a known race time at a base distance — get predicted times at 5 km, 10 km, half marathon and marathon distances using the Riegel exponent.