Race Time Predictor
Estimate performance at another distance with the Riegel model and compare predicted pace.
Estimated result
Check the entered values.
The Riegel model uses a 1.06 exponent. Training, endurance, terrain, and weather can produce a different result.
Riegel model
T₂ = T₁ × (D₂/D₁)^1.06 adjusts time for the difference between race distances.
A conditional prediction
Specific training, endurance, course, weather, and pacing can cause substantial differences.
Frequently asked questions
Does it work for any distance?
It works best between reasonably comparable distances for the same runner.
Is personal data sent to a server?
No. Calculations run locally in your browser and these values are not stored by default.
Can I use the result as medical advice?
No. It is an educational reference and does not replace individual assessment.
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