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Home » Rep Max Calculator

Rep Max Calculator

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(Bookmark this page or remember this URL: repmaxcalc.com).

Enter Weight & Reps to get RM Predictions.

I did for reps.

RM Average Lombardi Brzycki Epley Mayhew O’Conner Wathan Lander


About the Formulas:

  • Of course they are not 100% accurate, but they do a reasonably good job for up to 10 reps.
  • Epley seems to be better suited for low rep people with more fast twitch muscle fiber; for me Lombardi does a good job most of the time
  • Play around with the numbers to see what formula works best for you.
  • Read more about them on Wikipedia.

You can play with the Code on CodePen and help improve it.

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