Lean Body Weight Calculator
Find your lean body weight, the part of you that is muscle, bone, organs, and water rather than fat.
Awaiting Data
Enter your details and tap Calculate to see your results appear here.
Your result appears here.
What it measures
Lean body weight strips fat out of the picture. What remains is muscle, bone, organs, and the water they hold. Clinicians lean on this figure to dose certain medicines safely, since drugs often act on lean tissue rather than fat.
Knowing your lean mass also sharpens training goals. Build it through resistance work, and your metabolism rises with it. Compare your number against your body fat percentage for a fuller read.
How to use this calculator
- Choose metric or US units.
- Pick your sex.
- Enter your height and weight.
- Tap Calculate for your lean body weight.
The formula used
Women: LBW = 0.29569 × kg + 0.41813 × cm − 43.2933
- kg
- Body weight in kilograms.
- cm
- Height in centimetres.
Understanding Your Results
Tips to Improve
- Lift weights to protect and grow lean mass.
- Eat enough protein each day.
- Pair this with body fat for context.
- Recheck after major weight change.
Frequently Asked Questions
They describe the same idea. This page uses the Hume equation, common in clinical dosing.
Men carry more muscle and bone on average, so the equations differ.
Only a clinician should apply it. Treat the figure as a reference, not a prescription.
Scientific References
- Hume, R. (1966). Prediction of lean body mass from height and weight. Journal of Clinical Pathology, 19(4), 389–391.
- Janmahasatian, S., et al. (2005). Quantification of lean bodyweight. Clinical Pharmacokinetics, 44(10), 1051–1065.