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Calculator: Lean body weight (LBW, adult female)

Calculator: Lean body weight (LBW, adult female)

Total body weight  

Important: Inputs must be complete to perform calculation.

Decimal precision  


  • The formula depicted, which is based on gender, total body weight, and height, can be used to estimate LBW for adult females who are of normal weight or obese.
  • This calculation is not applicable to individuals with abnormal body water composition (eg, fluid overload).
  • This calculator is not validated in individuals at extremes of height, in those with highly muscular builds, or in underweight individuals.
  • The equation on which the calculator was based was derived from data on a population of individuals with bodyweights up to 216.5 kg or body mass index (BMI) up to 69.9 kg/m2 but was not validated in individuals weighing greater than 131.7 kg or with BMI over 38.4 kg/m2.
  • A separate calculator is available for estimating ideal body weight (method of Devine) and adjusted dosing weight.

Equations used
BMI[kg/m2] = Total_body_weight[kg] / sq(Height[cm] / 100)
LBW[kg] = (9270 * Total_body_weight[kg]) / (8780 + (244 * BMI[kg/m2]))


Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

Legal Notices and Disclaimer

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

EBMcalc is Copyright © 1998-2023 Foundation Internet Services, LLC

Topic 13408 Version 11.0