One Rep Max Calculator

One Rep Max Calculator

Formula used: Epley formula

Here's a breakdown of how it works:

  • weight: The weight lifted in the exercise.
  • reps: The number of repetitions performed with that weight.

The formula estimates the one-rep max by multiplying the weight lifted by 

The value of 30 in the denominator is a constant used in the Epley formula to provide a reasonable estimate based on empirical data.