EBM Consult

Adult BMI, Ideal Body Weight, and BSA Calculator

Change all to SI units?:

Age: years    (not valid if < 18 years of age)


Body Mass Index (BMI):
Total Body Wt (TBW):
Ideal Body Wt (IBW):
Lean Body Wt (LBW):
Adjusted Body Wt (ABW):
Percent Under/Over (IBW):
Body Surface Area (BSA):
using Boyd formula
using DuBois formula
using Gehan & George formula
using Haycock formula
using Mosteller formula

Assumptions for the use of this Body Assessment Calculator: 
  • The results only apply to patients >18 years of age
  • The patient does not have a growth and developmental problem
  • The interpretations provided for the Body Mass Index (BMI) results are applicable to patients not of Asian or Pacific Islander descent 
For additional information regarding the above as well as some of the formulas and supporting references for this medical calculator please click here