Instructions: Enter how much weight and reps you did for your last workout. It calculates your approximate one rep max.

Before beginning any strength-training program, it is advisable that a lifter determine their one-repetition-maximum (1RM) to gauge their current strength level. Essentially the result of one-repetition-maximum testing will give a precise indication of how much weight one is capable of lifting for one repetition across a range of exercises, sport specific or otherwise.

Calculate Your One-Rep Max (1RM)

Weight Lifted
Reps Done

= One-Rep Max

 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

Other Important Calculators