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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Formula
Calculates the weight of your body excluding total fat mass.
Worked Example
Lean Body Mass (LBM)
- 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.
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