Muscle Potential Calculator
Estimate your maximum muscular potential using Casey Butt's formulas based on bone structure
Choose your preferred measurement system
Choose your preferred measurement system
Measure around the smallest part, just below the wrist bone
Choose your preferred measurement system
Measure around the smallest part, just above the ankle bone
Your target body fat percentage for maximum muscle potential calculations
Maximum Lean Body Mass
Maximum Body Weight
Maximum Measurements
Casey Butt's Formula
LBM = H^1.5 × (√W/22.667 + √A/17.01) × (F/224 + 1)
Casey Butt's scientifically-derived formula calculates maximum natural lean body mass based on bone structure (wrist/ankle) and height. The formula was developed from measurements of elite natural bodybuilders at their competitive peak. LBM = Lean Body Mass, which excludes body fat. Total weight is calculated by dividing LBM by (1 - body fat %).