Calculate your one-rep maximum (1RM) for any weightlifting exercise using proven formulas like Epley, Brzycki, and Mayhew. Essential for programming strength training and tracking progress.
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How this calculator works
The Epley formula estimates your one-repetition maximum by multiplying the weight lifted by (1 plus the number of reps divided by 30). Brzycki uses w × (36 / (37 - r)) and Mayhew uses w × (100 × r) / (52.2 + 0.32 × r).
Common questions about this calculator
Exercise recommendations are general guidelines. Consult a physician before starting any new exercise program, especially if you have health conditions.
