Health & Fitness
One Rep Max Calculator.
Estimate your lifting One Rep Max (1RM) based on submaximal reps.
FREE INSTANT RESULTS NO SIGNUP UPDATED 2026
Parameters
lbs
Summary Output
Estimated One Rep Max
215 lbs
Visual Breakdown
Schedule Breakdown
How to Use
Enter the amount of weight lifted and the clean repetitions completed.
Example Calculation
Lifting 185 lbs for 5 clean reps yields an estimated 1RM of 185 * (1 + 5 / 30) = 215.8 lbs.
Formula
1RM (Epley) = Weight * (1 + Reps / 30)
Frequently Asked Questions
Common questions and answers about the One Rep Max Calculator.
The One Rep Max Calculator is a free online tool designed to estimate your lifting one rep max (1rm) based on submaximal reps. It allows you to perform these calculations quickly and accurately without manual computations.
Enter the amount of weight lifted and the clean repetitions completed. Once you enter these values, the calculator will automatically compute and display the results instantly.
The One Rep Max Calculator uses the following formula to calculate your results:
1RM (Epley) = Weight * (1 + Reps / 30)
This formula is standard and widely accepted for these types of calculations.
Sure! Here is a practical example:
Lifting 185 lbs for 5 clean reps yields an estimated 1RM of 185 * (1 + 5 / 30) = 215.8 lbs.
This example demonstrates how the inputs are processed through the formula to yield the final results.
To use the One Rep Max Calculator, you need to enter: Weight Lifted, Repetitions Completed. These inputs help the tool calculate precise results tailored to your situation.
The One Rep Max Calculator outputs the following details: Estimated One Rep Max. This comprehensive breakdown helps you understand the different aspects of the calculated figures.
Yes, the One Rep Max Calculator is 100% free with no registration or signup required. It is fully responsive and optimized for mobile phones, tablets, and desktop computers.
Reliable Calculator provides a fast, clean, ad-free, and premium user experience. The One Rep Max Calculator uses verified math formulas and provides instant results with visual breakdowns and examples, making it more intuitive than other tools.
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