1rm Calculator
Calculate your one-rep max (1RM) based on the weight lifted and number of repetitions performed.
Published by:
isCalculator Editorial Team
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How to use this tool?
- 1 Enter the requested data in the fields above carefully.
- 2 Click the calculate button to process the information instantly.
- 3 Analyze the detailed result and the formula explanation presented below.
- 4 You can print, share, or even embed the calculator on your own site for free.
Unlike traditional platforms, our AI tools adapt to specific user needs. They include detailed explanations of the formulas used, ensuring transparency in results. Furthermore, our design is focused on user experience, eliminating distractions and focusing on what really matters: your data and conclusions.
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Frequently Asked Questions
1RM stands for one-repetition maximum, the maximum weight you can lift for one complete repetition of an exercise.
We use the Epley formula: 1RM = weight × (1 + reps/30). This provides a reliable estimate for most people.
Yes, the 1RM calculator works for any resistance exercise where you can perform multiple repetitions to failure.
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