Free Adjusted Body Weight Calculator
Calculate ideal body weight and adjusted body weight for medication dosing in obese patients.
inches
kg
Ideal Body Weight
73.0 kg
Adjusted Body Weight87.8 kg
Percent Over IBW51 %
Ideal Body Weight vs Height
Dosing Weight Calculations
Ideal Body Weight (Devine Formula)
Male: IBW = 50 + 2.3 x (height in inches - 60) Female: IBW = 45.5 + 2.3 x (height in inches - 60)
Adjusted Body Weight
AdjBW = IBW + 0.4 x (Actual Weight - IBW)
Adjusted body weight is used for drug dosing in obese patients (>20% above IBW) because many drugs do not distribute fully into adipose tissue.
Example Calculation
A 70-inch tall male weighing 110 kg.
- 01IBW = 50 + 2.3 x (70 - 60) = 73 kg
- 02AdjBW = 73 + 0.4 x (110 - 73) = 73 + 14.8 = 87.8 kg
- 03Percent over IBW = (110 - 73) / 73 x 100 = 51%
Frequently Asked Questions
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