Lean Body Mass Calculator

Calculate Your Lean Body Mass

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Lean Body Mass Formulas

Lean Body Mass Formulas for Adults

The Boer Formula1:

For males:

eLBM = 0.407W + 0.267H - 19.2

For females:

eLBM = 0.252W + 0.473H - 48.3

The James Formula2:

For males:

eLBM = 1.1W - 128(W/H)2

For females:

eLBM = 1.07W - 148(W/H)2

The Hume Formula3:

For males:

eLBM = 0.32810W + 0.33929H - 29.5336

For females:

eLBM = 0.29569W + 0.41813H - 43.2933

Lean Body Mass Formula for Children

The Peters Formula4:

The author suggests that this formula is applicable for children aged 13-14 years old or younger. The formula is used to compute an eLBM based on an estimated extracellular volume (eECV) as follows:

eECV = 0.0215·W0.6469·H0.7236

eLBM = 3.8·eECV

Where:

  • W = Weight in kilograms
  • H = Height in centimeters
  • eLBM = estimated Lean Body Mass in kilograms
  • eECV = estimated Extracellular Volume in liters

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