Free One Rep Max Calculator
Estimate 1RM from a submaximal lift (Epley formula).
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Inputs
Result
Estimated 1RM
216 lbs
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Short answer
Estimate 1RM from a submaximal lift (Epley formula).
What is the One Rep Max Calculator?
Estimate 1RM from a submaximal lift (Epley formula).
How does the One Rep Max Calculator work?
Enter the inputs above and read the result.
Formula
Variables
wWeightrReps
Explanation
Epley formula. Most accurate for r ≤ 10.
Examples
Applications
Advantages
Limitations
Common mistakes
Tips
Related concepts
The One Rep Max Calculator 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 One Rep Max
Estimate 1RM from a submaximal lift (Epley formula). Within health calculators, one rep max belongs to the fitness & training cluster, where it shares terminology and assumptions with closely related tools.
Learning how one rep max is calculated
Epley formula. Most accurate for r ≤ 10. Working through the variables one at a time — w, r — makes the result reproducible by hand and easier to sanity-check.
Using one rep max to make a decision
Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How one rep max 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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