Predict your finish time for any race distance based on a recent performance. Uses established race equivalency formulas.
Enter your values below
Select a recent race distance.
Enter your time for that race.
Select the race you want predicted.
How this calculator works
Riegel's endurance model predicts finish times using an exponent of 1.06, which accounts for the nonlinear relationship between distance and fatigue.
Common questions about this calculator
These calculators are for informational purposes only. While we strive for accuracy, results should not be used as the sole basis for important decisions.
