Lean Body Weight (Janmahasatian)
Lean body weight (Boer formula, sex-specific) from total body weight and height — the dosing weight for drugs distributed to lean mass.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Sex
- Male
- Total body weight
- 100 kg
- Height
- 180 cm
Result: Lean body weight 69.5 kg (BMI 30.9).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Use
- Many anesthetic induction agents dose to lean body weight; contrast with ideal and adjusted body weight.
What you enter
- Sex
- Total body weight
- Height
How this is calculated
- Formula
- LBW = 9270·TBW/(6680 + 216·BMI) men, 9270·TBW/(8780 + 244·BMI) women; BMI = weight/height².
Janmahasatian S, Duffull SB, Ash S, Ward LC, Byrne NM, Green B. Quantification of lean bodyweight. Clin Pharmacokinet. 2005;44(10):1051-1065. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.