Calculate your lean body mass, muscle mass, and body fat percentage using scientifically proven formulas.
Lean Body Mass (LBM) represents the weight of your body minus all the fat. It includes muscles, bones, organs, and body water. Understanding your LBM is crucial for fitness, health monitoring, and nutrition planning.
The amount of skeletal muscle in your body
Weight of internal organs and bone structure
Water content in muscles and organs
Important: This calculator provides estimates based on statistical formulas. For the most accurate body composition analysis, consider DEXA scan or professional body composition testing.
Most accurate for general population
Male: (0.407 × weight) + (0.267 × height) - 19.2
Female: (0.252 × weight) + (0.473 × height) - 48.3
Good for athletic populations
Male: (1.1 × weight) - 128 × (weight/height)²
Female: (1.07 × weight) - 148 × (weight/height)²
Simple and reliable
Male: (0.32810 × weight) + (0.33929 × height) - 29.5336
Female: (0.29569 × weight) + (0.41813 × height) - 43.2933
Considers age factor
More complex formula that incorporates age as a variable