Available Calculators
Choose the calculator that matches the patient’s respiratory support.
Ideal Body Weight Calculator
Devine Formula
Calculate ideal body weight using patient height and gender.
Simple Oxygen Therapy Calculator
For Nasal Cannula, Simple Mask & Non-Rebreather
Estimate oxygen duration for fixed-flow oxygen therapy using cylinder pressure and flow rate.
HFNC Oxygen Duration Calculator
For Heated High Flow Nasal Cannula Therapy
Estimate oxygen duration using cylinder pressure, total flow, and delivered FiO₂.
BiPAP Oxygen Duration Calculator
For Patients Requiring BiPAP Therapy
Estimate oxygen duration for patients receiving BiPAP therapy using the Hamilton T1 ventilator.
Ventilator Oxygen Duration Calculator
For Intubated & Ventilated Patients
Estimate oxygen duration using current ventilator settings and available cylinder pressure.