Why not just use BMI?

BMI cannot tell muscle from fat. A powerlifter and a sedentary person of the same height can have identical BMIs but very different LBM.

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Lean Body Mass Calculator

Estimate your lean body mass using the Boer formula, which is more accurate than BMI for athletes and people carrying extra muscle.

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Why not just use BMI?: BMI cannot tell muscle from fat. A powerlifter and a sedentary person of the same height can have identical BMIs but very different LBM.