Running Race Predictor
Predict another race distance time from a recent result (Riegel).
Frequently asked questions
What does the Running Race Predictor do?
Predict another race distance time from a recent result (Riegel). Enter your values and get an instant estimate in your browser — free, with no signup.
Is the Running Race Predictor free to use?
Yes. OpenCalcy calculators are free to use, work on mobile, and keep favorites privately in your browser.
How is the Running Race Predictor calculated?
It uses this formula: t2 = t1 × (d2/d1)^1.06