II. Definitions

  1. Lean Body Mass
    1. Total body weight minus body fat

III. Indications

  1. Medication dose calculations
  2. Total Sodium Deficit (Hyponatremia)

IV. Calculation: Male

  1. Lean Body Mass (Boer formula, 1984)
    1. Lean Body Mass (kg) = (0.407 * wtKg) + (0.267 * htCm) - 19.2
  2. Lean Body Mass (Hume formula, 1966)
    1. Lean Body Mass (kg) = (0.32810 * wtKg) + (0.33929 * htCm) - 29.5336
  3. Lean Body Mass (James formula, least accurate but commonly used)
    1. Lean Body Mass (kg) = (1.1 * wtKg) - 128 * (wtKg/htCm)^2

V. Calculation: Female

  1. Lean Body Mass (Boer formula)
    1. Lean Body Mass (kg) = (0.252 * wtKg) + (0.473 * htCm) - 48.3
  2. Lean Body Mass (Hume formula, 1966)
    1. Lean Body Mass (kg) = (0.29569 * wtKg) + (0.41813 * htCm) - 43.2933
  3. Lean Body Mass (James formula, least accurate but commonly used)
    1. Lean Body Mass (kg) = (1.07 * wtKg) - 148 * (wtKg/htCm)^2

VI. Resources

  1. Fpnotebook Lean Body Mass Calculation
  2. Calculator.Net Lean Body Mass
    1. http://www.calculator.net/lean-body-mass-calculator.html
  3. Halls-MD Lean Body Mass
    1. http://halls.md/lean-body-weight-mass-explained/
  4. Richard Muirhead: Exploration of James Lean Body Mass - Time to Consider Others
    1. http://muirheads.co.uk/richard/RM_poster.pdf

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