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One Rep Max Calculator
Calculate your one-rep max and generate strength training percentages for powerlifting
Weight Lifted
(lbs)
Repetitions Performed
(reps)
Calculation Formula
Epley Formula (Most Popular)
Brzycki Formula
McGlothin Formula
Lombardi Formula
Training Percentage
100% (1RM)
95% (2-3 reps)
90% (3-4 reps)
85% (5-6 reps)
80% (6-8 reps)
75% (8-10 reps)
Calculate