Lean Body Mass Calculator
Estimate lean body mass (LBM) and body fat percentage based on body metrics.
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Result
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Our AI assistant provides general estimates and advice only. Please consult a qualified healthcare professional before making any health-related decisions.
Formula
How it works: Calculates the weight of your body excluding total fat mass.
Worked Example
Lean Body Mass Calculator - Boer and James Formulas
Lean Body Mass is the weight of your body excluding all fat tissue. It includes muscle, bone, water, and organs.
- Boer Formula (Male): 0.407 × Weight + 0.267 × Height - 19.2
- Boer Formula (Female): 0.252 × Weight + 0.473 × Height - 48.3
- LBM is a critical metric for determining protein needs and metabolic health
- Higher LBM generally correlates with a higher Basal Metabolic Rate (BMR)
LBM estimates from formulas are useful for tracking progress, but they do not account for individual variations in bone density or extreme muscle mass (bodybuilders).
You can also calculate changes using our Body Fat Calculator, BMI Calculator or Ideal Weight Calculator.
Frequently Asked Questions
What is lean body mass?
Lean Body Mass (LBM) is everything in your body besides fat. This includes muscle, bone, skin, organs, and body water.
Why is LBM important?
LBM is more metabolically active than fat tissue. Knowing your LBM helps in setting athletic goals and understanding your calorie and protein needs.
How is LBM different from muscle mass?
Muscle mass is just one component of LBM. LBM also includes bone and organ weight.
Is it possible to embed the Lean Body Mass Calculator on another website?
Yes, embedding the Lean Body Mass Calculator is free. Hit the "Embed" button on this page, adjust the width, height, and theme, then grab the iframe code. It works on WordPress, Wix, Squarespace, Shopify, and plain HTML pages. No registration needed. Full instructions at calculory.com/services/embed-calculators.
Medical Disclaimer
This calculator is provided for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making any decisions based on these results. Do not disregard or delay seeking medical advice because of information obtained from this tool.
AI Assistant
Ask about this calculator
I can help you understand the lean body mass calculator formula, interpret your results, and answer follow-up questions.
Try asking
Our AI assistant provides general estimates and advice only. Please consult a qualified healthcare professional before making any health-related decisions.
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