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One-Rep Max Calculator (Wathen 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. Meal Planner Build a day of meals from a 300-food pantry and watch calories and macros land against your targets. Workout Planner Build a 7-day training week from 160+ exercises and see weekly hard sets per muscle against your volume target.

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