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Max Deadlift Calculator - Calculate Your One Rep Max (1RM)


The calculator below can be used to determine your approximate one repetition maximum (1RM) weight for the deadlift. Enter the weight used (in pounds or kilograms) and the number of reps performed (≤20) and press the Calculate button.

1RM Deadlift Calculator


Weight (lb or kg):

Number of Reps:

Your 1RM Weight is:


This calculator uses a formula that is optimized for calculcating your 1RM deadlift weight. It uses a composite of the Lombardi and O'Connor formulas and the National Strength and Conditioning Association (NSCA) deadlift coefficients. For a more accurate 1RM bench press weight or 1RM squat weight, use the 1RM Bench Press Calculator or the 1RM Squat Calculator. For an explanation of how the various 1RM formulas work and the differences between them, visit the 1RM Formulas page.

1RM calculators are typically accurate to within 5% of your actual 1RM weight for calculations using 10 reps or less.  The accuracy of the formulas diminshes past 10 reps, and calculators such as this one should not be relied upon at all past 20 reps.  Keep in mind that this calculator is not 100% accurate and is only intended to be a good starting point for exercise programs that use your 1RM.


Neither MaxRepCalculator.com or the authors of this publication assume any liability for the information contained herein. The information contained herein reflects only the opinion of the author and should in no way to be considered medical advice. Specific medical advice should be obtained from a qualified and licensed health care practitioner. Consult your physician before you begin any nutrition, exercise, or dietary supplement program.

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