1-Rep Max (1RM) & Strength Load Calculator

Estimate your peak one-rep max and generate exact percentage load targets for strength, hypertrophy, and endurance sets.

Lift Weight & Reps Completed

Brzycki & Epley

Estimated 1-Rep Max (1RM)

265 lbs

90% (3RM) 238 lbs

80% (8RM) 212 lbs

70% (12RM) 185 lbs

95% Heavy Single / 2RM Load 252 lbs

85% Strength / 5x5 Working Weight 225 lbs

75% Hypertrophy / 8–10 Rep Working Weight 199 lbs

60% Explosive Speed / Dynamic Effort 159 lbs

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