One-Rep Max Calculator (OConner Formula)

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One-Rep Max Calculator (Brzycki Formula) Estimate your one-rep max from sub-maximal lifts using the Brzycki (1993) formula. Multi-Formula 1RM Comparison Calculator Compare Epley, Brzycki, and Lombardi 1RM predictions side-by-side from a single lift. One-Rep Max Calculator (Epley Formula) Estimate your one-rep max from submaximal lifts using the classic Epley formula. Continue in Guided Mode Run any calculator step by step. Your values carry across every tool in the session.

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