Free Marathon Time Predictor
Predict your marathon finish from a recent race result.
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Inputs
Result
Predicted marathon time
3:27:01
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Short answer
Predict your marathon finish from a recent race result.
What is the Marathon Time Predictor?
Predict your marathon finish from a recent race result.
How does the Marathon Time Predictor work?
Enter the inputs above and read the result.
Formula
Variables
T1, D1Recent race time and distance
Explanation
Peter Riegel's formula predicts endurance race times accounting for fatigue at longer distances.
Examples
Applications
Advantages
Limitations
- This tool is for general education only and is not medical advice. Consult a qualified healthcare professional for diagnosis or treatment decisions.
Common mistakes
Tips
Related concepts
The Marathon Time Predictor sits inside the Health Calculators hub, in the fitness & training cluster. Intensity, capacity and performance prediction. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Marathon Time Predictor
Predict your marathon finish from a recent race result. Within health calculators, marathon time predictor belongs to the fitness & training cluster, where it shares terminology and assumptions with closely related tools.
Learning how marathon time predictor is calculated
Peter Riegel's formula predicts endurance race times accounting for fatigue at longer distances. Working through the variables one at a time — T1, D1 — makes the result reproducible by hand and easier to sanity-check.
Using marathon time predictor to make a decision
Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How marathon time predictor compares with related measures
training zone, aerobic capacity, progressive overload, MET value all describe adjacent aspects of fitness & training. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
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