Adjusted Body Weight
Weight used for drug dosing in obese patients, blending actual and ideal body weight.
What is Adjusted Body Weight?
Weight used for drug dosing in obese patients, blending actual and ideal body weight. Adjusted Body Weight is intended for use in: Adults.
How to Use the Adjusted Body Weight Calculator
- Enter Actual weight in kg.
- Enter Height in cm.
- Enter Sex.
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
Clinical Considerations & Limitations
- Only intended to apply when actual weight exceeds ideal body weight by roughly 20% or more; for normal-weight patients, use actual body weight.
- The 0.4 correction factor is a general dosing convention and is not appropriate for every drug — check drug-specific dosing weight guidance.
References
- Devine BJ, 1974 (IBW basis); correction factor per widely used clinical pharmacokinetic dosing convention
Frequently Asked Questions
What is Adjusted Body Weight?
Weight used for drug dosing in obese patients, blending actual and ideal body weight.
Who is Adjusted Body Weight intended for?
Adults. Always confirm applicability to your specific patient before use.
What are the limitations of Adjusted Body Weight?
Only intended to apply when actual weight exceeds ideal body weight by roughly 20% or more; for normal-weight patients, use actual body weight. The 0.4 correction factor is a general dosing convention and is not appropriate for every drug — check drug-specific dosing weight guidance.
What formula or reference does Adjusted Body Weight use?
Devine BJ, 1974 (IBW basis); correction factor per widely used clinical pharmacokinetic dosing convention
Is Adjusted Body Weight a diagnosis?
No. Adjusted Body Weight produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
