Lean Body Mass Formula
Lean Body Mass (LBM) represents the weight of everything in your body except fat, encompassing muscle, bone, organs, and water. This formula provides an estimation of LBM based on your weight and height.
Formula
Copy the exact expression or work through it step by step below.
Lean Body Mass = 0.407 x Weight + 0.267 x Height - 19.2 Variables
LBM
Lean Body Mass
The lean body mass value plugged into the lean body mass calculation.
Weig
Weight
The weight value plugged into the lean body mass calculation.
Heig
Height
The height value plugged into the lean body mass calculation.
Step By Step
- 1
Set the baseline case with the real calculator inputs.
Sex = Male, Weight Kg = 80, Height Cm = 178
- 2
Translate rates, periods, and cash values onto the same footing before combining them.
Keep the lean body mass assumptions consistent instead of mixing monthly and annual views.
- 3
Apply the formula and read the first calculator outputs, not just the headline assumption.
The calculator lands with average lbm kg at 55 and average body fat pct at 31.2%.
- 4
Run one changed scenario so the formula is stress-tested before it is trusted.
The lean body mass calculator page is the fastest way to compare that second case.
Worked Example
Lean Body Mass sample case
Sex
Male
Weight Kg
80
Height Cm
178
Lean Body Mass = 0.407 x Weight + 0.267 x Height - 19.2 using sex Male, weight kg 80, height cm 178.
The calculator lands with average lbm kg at 55 and average body fat pct at 31.2%.
Common Variations
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Sources & References
- Assessment of body composition — PM&R (Physical Medicine and Rehabilitation Journal) / NIH
- Body composition prediction equations and the effect of changes in body fluid compartments on their accuracy — European Journal of Clinical Nutrition / PubMed
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