Ideal body weight (IBW) and adjusted body weight calculator: Devine

For doctors and health professionals

A tool to support the clinical decisions of doctors and health professionals, not for self-diagnosis or self-treatment.

This calculator is inside the patient's file in Clinicato: open it from "Medical tools" while you chart the visit, it fills in from the patient's details and vital signs where they are recorded, and adds its result to the visit's plan in one tap, with the "Medical tools" add-on. Try it in your clinic

Calculator

Medical note: The result supports a clinical decision, it does not replace the doctor's judgement or examining the patient, and is to be checked against your reference before any treatment decision.

How it works and when to use it

Devine: 50 kg for men and 45.5 kg for women, plus 2.3 kg per inch over 5 feet (152.4 cm), and adjusted body weight = IBW + 0.4 × (actual − IBW).

Ideal or adjusted weight replaces actual weight for some drug doses in obesity and in the Cockcroft-Gault equation, as the drug reference sets.

Reference: Devine BJ. Drug Intell Clin Pharm 1974;8:650-5; adjusted body weight = IBW + 0.4 × (actual − IBW)

Frequently asked questions

How is it different from the ideal weight calculator?

The ideal weight calculator for everyone shows the healthy range by BMI, Devine gives one number used in drug calculations.

When is adjusted weight used?

Usually when actual weight is more than 20 to 30% above ideal, for drugs such as some antibiotics, as the drug reference says.

All medical tools

Clinic software for this specialty

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These calculators are free here for everyone, and in Clinicato 49 medical tools work inside the patient's file with the "Medical tools" add-on: filled from the visit and the vital signs, with the result added to the visit's plan, next to appointments, prescriptions and invoices.

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