Squat 1RM Calculator
Estimate your squat one rep max using 6 proven strength training formulas. Enter your squat weight and how many reps you completed.
How to Calculate Your Squat 1RM
Your squat one rep max (1RM) is the maximum weight you can squat for a single repetition. It's the king of lower body strength metrics and one of the most important lifts for powerlifters, athletes, and strength enthusiasts. Testing your true squat max requires significant recovery and technique precision, so most lifters estimate their 1RM from submaximal training sets.
If you can squat 140 kg for 5 reps, proven mathematical formulas can predict your single-rep max. This calculator uses six well-established formulas (Epley, Brzycki, Lombardi, Mayhew, O'Conner, and Wathan) and averages them for a reliable estimate.
The percentage table helps you program your squat training. Hypertrophy-focused programs often use 70-85% of 1RM, while strength programs work at 85-95%. Use your estimated max to set the right loads for every training session.
Squat depth, bar position (high bar vs low bar), and equipment (sleeves, belt, wraps) all influence your true max. This calculator provides a baseline — adjust your training loads based on how the weight moves and feels.