Ideal Body Weight and Adjusted Body Weight

Calculates ideal body weight (Devine formula) and adjusted body weight.

Clinical calculator

Ideal & Adjusted Body Weight

Calculate ideal body weight (IBW) and, where relevant, adjusted body weight (AdjBW).

Patient details

Use the patient’s measured height.

Required only to calculate adjusted body weight.

Sex used for calculation

Results

Enter height and sex, then select Calculate.

Ideal Body Weight (IBW)

Calculated using the Devine formula.

Adjusted Body Weight (AdjBW)

Enter actual body weight to assess this result.

Clinical note: Use local prescribing, nutrition, or critical-care guidance to determine the appropriate dosing weight. These estimates do not replace clinical judgment.

Method: Devine IBW equation. AdjBW = IBW + 0.4 × (actual body weight − IBW), displayed when actual body weight is more than 120% of IBW.

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