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Calculate Ideal Body Weight (IBW) and Predicted Body Weight (PBW) using the Devine formula, plus the safe lung-protective tidal volume range.
Enter values below and click the button to get your result.
For educational reference only. Always verify results with your clinical team and follow your facility's protocols.
Select the patient's biological sex
Enter the patient's height
Select the unit (cm or inches)
Click 'Calculate IBW / PBW'
View IBW, PBW and the safe tidal volume range (6–8 mL/kg PBW)
IBW (Devine): Males = 50 + 2.3 × (height in inches − 60); Females = 45.5 + 2.3 × (height in inches − 60)
PBW equals IBW and is used for ventilator tidal volume targeting
Always use PBW for tidal volume — NOT actual body weight
Tidal volume targets: 6 mL/kg for ARDS, 6–8 for lung-protective, 8–10 for standard
Formula applies to heights > 60 inches (152 cm)
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