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How to Calculate One-Rep Max: Epley vs Brzycki Formula
Learn how one-rep max is estimated using the Epley and Brzycki formulas and calculate your estimated 1RM.
How to Calculate One-Rep Max: Epley vs Brzycki Formula
One-rep max, commonly written as 1RM, represents the maximum weight a person can theoretically lift for one repetition.
Testing a true maximum can be demanding, so calculators can estimate 1RM from a weight lifted for multiple repetitions.
Two commonly used formulas are the Epley and Brzycki equations.
The Epley formula is commonly represented as:
1RM = weight × (1 + reps ÷ 30)
The Brzycki formula uses a different relationship between weight and repetitions.
Because the equations differ, the same workout can produce slightly different estimated 1RM values.
Use our [ONE REP MAX CALCULATOR] to compare supported formulas.
An estimated 1RM is not the same as an actual tested maximum. Technique, fatigue, exercise selection and training experience can affect real-world performance.
Related BMI information
You can also use Open the BMI calculator and Read more helpful articles as part of your workflow.
Using a one rep max formula can make this task easier and more efficient when you need a simple online solution.
Practical tips for better results
Before using How to Calculate One-Rep Max: Epley vs Brzycki Formula, check the original file or information carefully and decide what result you need. A clear starting point makes the process easier to manage and helps you avoid unnecessary changes. If you are working with an online utility, review the available options before processing your file so you can choose settings that match the task.
For regular workflows, keep your files organized and compare the result with the original after processing. This is particularly useful when quality, formatting, compatibility, or file size matters. If the first result is not ideal, adjust the available settings and try again rather than changing several things at once. The goal of a one rep max formula workflow is to save time while keeping the final result accurate and usable.