Work out ventilator tidal volume instantly with clear inputs, formula shown and shareable results.
Calculates predicted body weight from height and sex using the Devine formula, then applies a lung-protective millilitres-per-kilogram target.
Devine predicted body weight
Male PBW = 50 + 2.3 x (height in inches - 60); female PBW = 45.5 + 2.3 x (height in inches - 60); tidal volume = PBW x target mL/kg
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Lung size tracks height, not body fat, so actual weight would over-inflate the lungs of heavier patients.
ARDSNet lung-protective ventilation uses 6 mL/kg predicted body weight, with 4 to 8 mL/kg as the working range.