Parameters:
(1) total body potassium content in mEq
(2) body surface area in square meters
(3) body weight in kilograms
lean body mass in kilograms =
= (0.0119 * (total body potassium)) + (6.04 * (body surface area))
where:
• The total body potassium reflects the body cell mass.
• The body surface area reflects extracellular fluid volume.
For a male:
total body potassium content in mEq =
= 39.2 * ((body weight in kilograms)^1.09)
If these equations are combined:
lean body mass in kilograms =
= (0.46648 * ((body weight)^1.09)) + (6.04 * (body surface area))
