Body Mass Index (BMI), Ideal Body Weight (IBW) and Adjusted Body Weight (AjBW) Calculator for patients 0 to 19 years

Date of Birth *

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Height (cm) *

Actual Body Weight (ABW) (kg) *

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Formulas Used Actual BMI = Weight(kg) ÷ Height (cm) ÷ Height (cm) × 10,000 Expected BMI: 50th percentile from LMS model data for WHO Growth Charts for Canada, 2014 revision IBW = Expected BMI × Height (cm) × Height (cm) ÷ 10,000 % IBW = (Actual Body Weight (kg) ÷ IBW (kg)) x 100 AjBW = IBW + 0.4 (ABW - IBW)
Actual BMI	kg/m²
Expected BMI
IBW
% IBW
Adjusted Body Weight AjBW is calculated when the actual body weight (ABW) is ≥ 20% above the IBW