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Adjusted Body Weight for Drug Dosing Calculator

AdjBW = IBW + 0.4 × (ABW − IBW).

Calculates the adjusted body weight for obese patients: AdjBW = IBW + 0.4 × (ABW − IBW), where IBW is ideal body weight (Devine formula). Used for drug dosing when ABW > 130% IBW.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

kg
kg

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

AdjBW = IBW + 0.4 × (ABW − IBW)

In depth

Calculates the adjusted body weight for obese patients: AdjBW = IBW + 0.4 × (ABW − IBW), where IBW is ideal body weight (Devine formula). Used for drug dosing when ABW > 130% IBW.