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💪 Lean Body Mass Calculator

Calculate your lean body mass (LBM) — everything except fat: muscle, bone, organs, and water. LBM is used to set accurate protein and calorie targets.

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Your Results

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Lean Body Mass (average of formulas)
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Boer formula
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James formula
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Hume formula
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Fat mass (est.)
Lean body mass is used to calculate accurate protein targets (typically 2.2–3.3g per kg of LBM for active individuals) and to set calorie goals for body recomposition.
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