Race Time Predictor
Enter a recent race result and get predicted finish times for the other distances. Predictions assume you're equally trained for the target distance.
Time as hours:minutes:seconds, e.g. 22:30 or 1:23:45.
That time doesn't look right. Try h:mm:ss, like 1:23:45.
Predicted times
Uses Riegel's formula (T₂ = T₁ × (D₂ ÷ D₁)1.06), the same one most race predictors are built on. It's most accurate between neighbouring distances: a 5K predicts a 10K better than it predicts a marathon.