🏋️
One Rep Max (1RM) Calculator
Estimate your one-rep maximum for any lift using the Epley formula.
About This Calculator
The Epley formula (1985) remains one of the most validated 1RM estimation methods. Strength standards for a 185-lb male: Bench Press novice 135 lbs, intermediate 205 lbs, advanced 290 lbs. Deadlift novice 225 lbs, intermediate 315 lbs, advanced 450+ lbs.