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1 Rep Max, Rep Max, and Max Reps Calculator – 7 Equations

HERE is a little calculator I whipped up.

This calculator uses 7 different equations that are in use today to calculate a 1RM.

  1. Calculate your estimated One Rep Max based on how many repetitions you performed at a given weight.
  2. Calculate the weight to use on a Rep Max attempt.

    I.e. You are progressively working up to a new 5 RM every week, this week you predict you can hit a 5RM that         represents a 1RM of 440. Put in 5 reps and 440lbs, and smash ~380lbs for 5

  3. Calculate the number of reps you should be able to get at any given weight, knowing your 1RM. Note: Lombardi and O’Conner et al. are very high estimates for some weights given the nature of their equation. I would not consider these accurate.

Enjoy!

Equations Used: Epley, Brzycki, Lander, Lombardi, Mayhew et al. , O’Conner et al. , and Wrathan

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