Race Predictor
Estimate 5K, 10K, half and marathon times from a recent race using a common Riegel-style formula. Not medical advice, not a guarantee, and not a training plan.
Frequently asked questions
How is this predicted?
It uses a Riegel-style power formula with exponent 1.06. Real race day depends on training, weather and course.
Is this medical advice?
No. It is a race-time estimate only — not medical advice or a training plan.
Is this a training plan?
No. It only estimates other race times from one result.