Lean Body Mass Calculator
Estimate lean body mass with Boer, James, or Hume equations. Compare all three formulas,…
Free calculation tools
Clear calculators and converters with transparent formulas, cited methods, and practical next steps.
Estimate lean body mass with Boer, James, or Hume equations. Compare all three formulas,…
Calculate waist-to-hip ratio in metric or imperial units. See the exact formula, WHO reference…
Calculate raw and normalized FFMI from weight, height, and body-fat percentage. See the formula,…
Calculate BRI from waist and height with the original ellipse formula, metric or imperial…
Estimate relative fat mass from height and waist with the published RFM formula, metric…
Every calculator shows the exact formula used, with no black boxes.
Formula methodologyFormula, input, source, and limitation checks are recorded before publication.
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