// multi-utility computation suite · offline · instant · precise
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health.lean-body-mass Calculator
Calculates lean body mass (total weight minus fat mass) from body weight and body fat percentage using Boer, James, and Hume formulas. Lean body mass is the correct basis for drug dosing in obese patients where weight-based dosing would overdose.
Inputs
Wt
Body or object weight. For health calculators, usually in kg or lbs.
Ht
Vertical measurement. For health calculators, typically standing height without shoes.
Sex
Reference formula or conversion factor shown for context.
Goal
Body or object weight. For health calculators, usually in kg or lbs.
Results
lean body mass
Body weight minus fat mass — muscle, bone, organs, and water. More useful than total weight for fitness assessments and medication dosing.
fat mass
The computed mass of the object or substance.
goal body fat %
The value at the specified point or condition.
fat to lose for goal
LOS (length of stay) -- the number of days from admission to discharge. A key hospital efficiency metric.
weeks at 0.5kg/wk
The result expressed in weeks. Multiply by 7 to convert to days.