The WeighTrainer

Weight and Rep Calculator

The calculator below will predict the maximum amount of weight you can use for a specified number of reps if you know how many reps you can do with a given weight now (your nRM). It also predicts the number of reps you can perform with another weight. It is based on manipulations of the Brzycki, Epley and Lander Equations. Keep in mind that these calculations are not typically accurate for rep counts of higher than 10 to 12. For more information on what these estimates mean, and how they should be used, please see the article Formulas And Coefficients That Predict Your 1-Rep Maximum on the Training Related Articles page.
Known Performance
nRM Weight:    Reps (n):


Desired Performance
# of reps you wish to perform:
OR
Weight you wish to use:



Predictions
Brzycki Equation
    Max. weight you can use:
Max. reps you can perform:

Epley Equation
    Max. weight you can use:
Max. reps you can perform:

Lander Equation
    Max. weight you can use:
Max. reps you can perform:


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