What Is the Lean Body Mass Calculator?
The sum of non-fat tissue in the body: muscles, skeleton, vital organs, blood, and fluids.
How Does the Lean Body Mass Calculator Work?
Applies validated anthropometric regression formulas (Boer, James, Hume) using height and weight.
Lean Body Mass Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Boer LBM = 0.407×W + 0.267×H − 19.2 (Men) | 0.252×W + 0.473×H − 48.3 (Women)
Boer formula estimates non-adipose weight from height and total body mass.
How to Use the Lean Body Mass Calculator
- Select biological sex and enter your current weight in kilograms and height in centimeters.
Step-by-Step Example Calculation
Male 75kg / 175cm
Input Values:
gender:male
weightKg:75
heightCm:175
Worked Steps: Yields 58.0 kg of lean body mass and 22.7% body fat.
Understanding Your Result
Shows total lean mass in kg, along with estimated body fat percentage and fat mass.
Factors That Affect the Result
- Resistance training, hydration, bone density, and genetics.
When Should You Use This Calculator?
- Setting macronutrient protein targets, monitoring bodybuilding cuts, or calculating drug dosages.
Assumptions & Limitations
- Formula accuracy decreases for elite bodybuilding populations with sub-6% body fat.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Standard clinical regression equations calibrated across large population samples.