One-Rep Max (1RM) Strength & Percentage Table Calculator
Calculate your estimated 1RM for bench press, squat, and deadlift using validated Brzycki and Epley formulas, complete with training percentage breakdowns (95% down to 60%).
Calculator Inputs
Live Real-TimeEstimated One-Rep Max (1RM)
Heavy Strength Load (85% 1RM - 5-6 Reps)
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Hypertrophy Muscle Load (75% 1RM - 8-10 Reps)
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Detailed Calculation Breakdown
Calculation Methodology
Epley Formula: 1RM = Weight * (1 + Reps / 30). Brzycki Formula: 1RM = Weight / (1.0278 - 0.0278 * Reps).
Important Legal & Educational Disclaimer
Estimating 1RM from sub-maximal sets (3–10 reps) provides accurate programming targets while minimizing central nervous system fatigue and injury risk.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
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