Fat Mass Calculator
Calculate total adipose fat mass and lean mass in kilograms and pounds
Fat tissue represents 18% of total 75.0 kg body mass
Two-Compartment Body Composition
Mathematical Formula & Scientific Methodology
Formula: Two-Compartment Body Composition Division
Fat Mass = Weight × (Body Fat % / 100)Separates total scale weight into chemical fat mass and all remaining fat-free components.
Model Assumptions
- Accurate body fat percentage input
Variables & Standard Units
| Symbol | Physiological Meaning | Unit |
|---|---|---|
| Weight | Total measured body weight | kg |
| Body Fat % | Measured or estimated percentage of adiposity | % |
Scientific Limitations
- Depends directly on accuracy of the body fat assessment method used
Peer-Reviewed Scientific Citations
Obesity: preventing and managing the global epidemic. Report of a WHO consultation (2000)
World Health Organization (2000) — WHO Technical Report Series, 894, 1-253
Key Finding: Standard international adult BMI classifications: Underweight (<18.5), Normal (18.5-24.9), Overweight (25.0-29.9), Obesity Class I (30.0-34.9), Class II (35.0-39.9), Class III (>=40.0).
Frequently Asked Questions
Related Calculators & Next Steps
Body Fat Calculator
Estimate body fat percentage using the US Navy Circumference Method
Lean Body Mass Calculator
Total mass of muscle, bone, organs, and body water excluding adipose tissue
FFMI Calculator
Fat-Free Mass Index & Normalized Natural Muscularity Potential