🏋️

One Rep Max Calculator

Calculate one rep max (1RM) for weightlifting exercises. Estimate maximum strength, training percentages, and progressive overload using Brzycki, Epley, or Lombardi formulas.

Weight Lifted*

lbs

Repetitions Completed*

Number of reps (1-10 for accuracy)

Calculation Formula

Results

Frequently Asked Questions

What is One Rep Max (1RM)?+

Which formula is most accurate?+

How often should I test my 1RM?+

What percentage should I use for training?+