Lean Body Mass Calculator
Calculate your Lean Body Mass (LBM), or your total body weight minus fat mass. Enter a known body-fat percentage, or estimate fat-free mass using the Boer equation.
Enter Your Details
Enter your body fat percentage if known, or leave it blank to use the Boer formula estimate.
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What Is Lean Body Mass?
Lean Body Mass (LBM) = Total Body Weight – Fat Mass. It includes:
Muscle
Bone
Organs
Water
LBM can provide additional context for protein planning and TDEE estimates, because lean tissue contributes to resting energy expenditure.
Typical Body Fat % Ranges by Goal
| Category | Men (%) | Women (%) |
|---|---|---|
| Essential Fat (minimum) | 2–5% | 10–13% |
| Athletic | 6–13% | 14–20% |
| Fitness | 14–17% | 21–24% |
| Average / Acceptable | 18–24% | 25–31% |
| Obese Range | 25%+ | 32%+ |
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Lean Body Mass: simple Hinglish explanation, real example, common mistakes, FAQs aur Asterisks calculators ke practical use ke saath.
How the Calculation Works
Asterisks Fit lean body mass calculations utilize standard anthropometric modeling equations:
- Body-Fat Percentage Method: If your body fat percentage is known, LBM is calculated directly from body weight:
Lean Mass = Total Weight × (1 − Body Fat %)This method depends on the accuracy of the body-fat percentage you enter. - Boer Equation (1984): If body fat percentage is not provided, the calculator estimates LBM using the Boer mathematical equations:
Men: LBM = (0.407 × W) + (0.267 × H) − 19.2 | Women: LBM = (0.252 × W) + (0.473 × H) − 48.3
Need Help Applying Your Results?
Your estimated lean mass can provide additional context when planning protein intake and resistance training. A coach can help you turn general estimates into a practical routine.
Frequently Asked Questions
LBM estimates depend on formula assumptions or the accuracy of the body-fat percentage entered. They are not a substitute for clinical body composition analysis. Read disclaimer.