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Home » Bodybuilding, Health and Fitness Calculators » 1 Rep Max Calculator

1 REP MAX CALCULATOR

Mass lifted (kg)

Repetitions performed until failure

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The above 1 Rep Max calculator (1RM, 1 Repetition Maximum) is based on Brzycki's equation. This equation estimates your one rep max based on the number of repetitions you can perform on a particular exercise until muscular failure. The equation will only provide a valid estimation for repetitions of magnitude ten or below.

References:

Brzycki, M. Strength testing: Predicting a one-rep max from a reps-to-fatigue, Journal of Physical Education, Recreation and Dance 64 (1): 88-90, 1993

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