Adjusted Body Weight Calculator
Adjusted Body Weight
Free adjusted body weight calculator for clinical dosing and nutrition
cm
kg
Formula
ABW = IBW + Factor × (Actual Weight - IBW). IBW (Devine): Male=50+2.3×(inches-60), Female=45.5+2.3×(inches-60)
Frequently Asked Questions
When should adjusted body weight be used?
ABW is used for drug dosing (aminoglycosides, vancomycin) and calorie calculations in patients >120% of ideal body weight.
What adjustment factor should I use?
0.4 is standard for most clinical applications. Some drugs (like vancomycin) may use 0.3-0.5 depending on institutional protocols.
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