One Rep Max Calculator

Calculate your one rep max using the Brzycki Formula, a scientifically validated method for estimating your maximum strength.

Note: This calculator provides an estimate of your one rep max. Always use proper form and progressive overload when training.

Select Exercise

Select Unit System

Your Bodyweight

kg

Exercise Weight

kg

Number of Reps

reps

Enter your weight and reps to see your estimated one rep max

Disclaimer: The contents of this site is for informational purposes only and should not be seen as medical advice