1RM (One Rep Max) is the maximum weight you can lift for a single repetition of a given exercise using proper form. It’s a common strength benchmark used by athletes, trainers, and lifters to assess progress and plan workouts.
To estimate your 1RM without maxing out in the gym, enter the weight you lifted and the number of reps you completed with that weight. The calculator uses the Epley formula to estimate your 1RM and offers common percentages (e.g. 80%, 70%) to help you plan strength training sets.
Use this to design your sets for hypertrophy, strength, or endurance. Always prioritize proper form and recovery when training at high intensities.