General

Adjusted Body Weight

Dosing weight in obesity.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use for weight-based drug dosing in obesity where adjusted body weight is recommended (e.g. some aminoglycoside regimens).

Why use

Actual body weight can overdose, and ideal body weight underdose, in obesity.

Critical actions

AdjBW = IBW + 0.4 × (actual − IBW), using Devine IBW. Always check the specific drug's recommended dosing weight.

Evidence & references

  1. Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974.

Related calculators

Ideal Body Weight (Devine)Ideal body weight from height and sex.Body Mass Index (BMI)Weight-for-height screening measure.Body Surface Area (Mosteller)BSA from height and weight.

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