How it works
Boer, James, and Hume estimate lean body mass from height, weight, and sex-based coefficients. The calculator shows each result instead of hiding their spread behind one number.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?mode=Equation groupChoice · Required · Default: adult · Accepted values: adult, child
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?unitSystem=UnitsChoice · Required · Default: metric · Accepted values: metric, imperial
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?sex=Sex used by equationChoice · Required · Default: male · Accepted values: male, female
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?age=AgeNumber · Required · Default: 30
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?weightKg=WeightNumber · Required · Default: 70 · Used when unitSystem = metric
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?heightCm=HeightNumber · Required · Default: 175 · Used when unitSystem = metric
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?weightLb=WeightNumber · Required · Default: 154 · Used when unitSystem = imperial
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?feet=Height feetNumber · Required · Default: 5 · Used when unitSystem = imperial
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?inches=Height inchesNumber · Required · Default: 9 · Used when unitSystem = imperial
Outputs
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averageAverage adult estimateText · Primary output
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boerBoer estimateText
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jamesJames estimateText
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humeHume estimateText
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petersPeters child estimateText
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leanPercentLean mass percentagePercentage
Pediatric mode
Peters first estimates extracellular volume and then derives lean body mass. Pediatric interpretation belongs with a qualified clinician.