one rep max coolHow to use our One Rep Max (1RM) Calculator:

  1. Enter weight lifted using the slider. You can adjust the value incrementally using the + or – buttons.
  2. Enter the number of repetitions you performed.

Your estimated 1RM will automatically be calculated (Epley formula) based on the values you entered. This will provide a decent estimate of what you could lift without actually having to “max out”, which can cause injury. This can be a useful tool for beginning and advanced lifters alike.

1 RM:
1RM 95% 90% 85% 80% 75% 70% 65% 60%

Based on your 1RM result, the table below estimates the reps and weight estimates you could perform, comparing calculations from three different methods.

Estimated Reps and Weight
# Reps Baechle (lbs) Brzycki (lbs) Dos Remedios (lbs)


One thought on “One Rep Max Calculator”

  1. At this point a little advanced for me but a superlative answer to questions reference to the on going narratives espoused by seemingly everyone one rep maximum thanks to you from convoluted and perpetual to user friendly especially us in the ADHD community

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