Weight you lifted (in lb)
Repetitions performed
Based on 4 proven formulas: Epley, Brzycki, Lombardi, and O'Conner
Your one-rep max (1RM) is the maximum weight you can lift for a single repetition. This calculator estimates it based on lighter weights and higher reps using proven scientific formulas.
Get specialized 1RM estimates for specific exercises with form tips and strength standards.
Calculate your bench press 1RM with form guidance and strength standards.
Estimate your deadlift max with safety tips and form checkpoints.
Get your squat 1RM with depth guidelines and mobility tips.
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