Adjusted Body Weight Calculator

Calculate adjusted body weight for obese patients. Used in clinical nutrition for drug dosing and calorie calculations.

βš–οΈ Adjusted Body Weight

Results

Ideal Body Weight (Devine)65.9 kg
Adjusted Body Weight79.6 kg
Excess Weight34.1 kg

πŸ’‘ What Is Adjusted Body Weight?

Adjusted Body Weight (ABW) = IBW + factor Γ— (Actual Weight βˆ’ IBW). The standard adjustment factor is 0.4, meaning 40% of excess weight is metabolically active. Ideal Body Weight (IBW) uses the Devine formula.

ABW is used when a patient exceeds their IBW by more than 30%. It provides a more accurate weight for calculating drug doses (antibiotics, chemotherapy), calorie needs (TPN), and creatinine clearance.

100 kg patient, 170 cm male: IBW = 66.5 kg, ABW = 66.5 + 0.4 Γ— (100 βˆ’ 66.5) = 79.9 kg.

Adjusted Body Weight Calculator FAQ

πŸ”— Related Calculators

Ideal Weight CalculatorCalculate your ideal body weight using multiple scientific formulas β€” Devine, Robinson, Miller, and Hamwi. See your healthy weight range.BMI CalculatorCalculate your Body Mass Index (BMI) from height and weight. See your BMI category and healthy weight range instantly.Lean Body Mass CalculatorCalculate your lean body mass β€” the weight of everything in your body except fat. Uses Boer, James, and Hume formulas.