Race Time Predictor

Predict your time at a new distance from a recent race result (Riegel formula).

Known distance (km)

Known time: minutes

seconds

Target distance (km)

Predicted time

—

Pace—

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How it works

T2 = T1 × (D2 ÷ D1)^1.06

Frequently Asked Questions

How does the Race Time Predictor work?

Predict your time at a new distance from a recent race result (Riegel formula).

Is this medical advice?

No. It gives general estimates only. For decisions about your health, speak with a qualified professional.