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Utility

1RM (One-Rep Max) Strength Calculator

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Estimate one-rep max (1RM) using Epley, Brzycki, and Lombardi formulas.

Output

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Privacy & Security

Calculated locally in your browser. Not medical advice. Lift safely.

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update v1.0
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How to Use

Enter weight and reps to estimate 1RM with multiple formulas.

Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.

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