Free One-Rep Max (1RM) Strength Calculator (Brzycki & Epley) Online
Estimate your true One-Rep Max (1RM) for Bench Press, Squat, and Deadlift from submaximal repetitions without injury risk. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Enter Lifted Weight
Input weight lifted in kg or lbs.
Enter Completed Repetitions
Input reps completed with clean form (1 to 10 reps).
Compare 1RM Formulas
Review estimates from Brzycki, Epley, Lombardi, and O'Conner equations.
Inspect Training Percentage Table
View exact weights for 70% (hypertrophy), 80% (strength), and 90% (peaking).
Frequently Asked Questions
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