Advanced One Rep Max Calculator
Calculates your true strength potential using RPE Autoregulation & Smart Algorithms.
Your Estimated One Rep Max
Visual Plate Loader (One Side)
Rep Max Planner
Target specific reps?
Strength Curve
Why This is the Best 1RM Calculator
Most online calculators have a fatal flaw: they assume every set you do is taken to absolute failure (RPE 10). Our "Advanced Strength Intelligence" engine allows you to input your Rate of Perceived Exertion (RPE). If you lift 225 lbs for 5 reps but feel like you could have done 2 more, our algorithm calculates your max based on the "Virtual Reps" you had in the tank, providing a far more accurate training number.
Understanding the "Smart Estimate"
No single formula is perfect for every lift. Our Smart Consensus engine dynamically weighs the most accurate formulas based on scientific research:
- Epley Formula: Prioritized for Squats and Deadlifts (Lower Body).
- Brzycki Formula: Weighted higher for Bench Press (Upper Body).
- Lombardi/Mayhew: Used for higher rep sets (15+) to account for metabolic endurance.
Visual Plate Loader
Stop doing math in your head. Our tool includes a visual representation of the barbell sleeve, showing you exactly which plates to load to hit your target weight.