One-Rep Max (1RM) Calculator

Weight Lifted
Reps Done

 95% 1 RM
 90% 1 RM
 85% 1 RM
 80% 1 RM
 75% 1 RM
 70% 1 RM
 65% 1 RM
 60% 1 RM
 55% 1 RM
 50% 1 RM

One-Rep Max =

The online One-Rep Max (1RM) Calculator to find one repetition maximum or 1RM. When you in a single repetition for a given exercisethe, 1RM means the maximum amount of weight one can lift.

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