The Devine formula estimates ideal body weight (IBW) based on height and sex. IBW is widely used in clinical settings for drug dose calculations, ventilator tidal volume settings, and as a reference point for adjusted body weight in obese patients.
Formula
- Male: IBW (kg) = 50 + 2.3 × (Height in inches − 60)
- Female: IBW (kg) = 45.5 + 2.3 × (Height in inches − 60)
When to Use IBW
- Aminoglycoside dosing in obese patients
- Mechanical ventilation tidal volumes (typically 6 mL/kg IBW for ARDS)
- Calculating adjusted body weight (AdjBW)
- Underweight/overweight clinical assessments
Limitations
The Devine formula assumes a minimum height of 60 inches (152 cm / 5 ft). Below this height, the formula yields unreliable results. For pediatric or short-stature populations, alternative formulas should be used.