Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Pulmonology
Calculate O2 cylinder duration for D, E, G, H/K, and M tanks. Enter PSI and flow rate (L/min) for instant results in minutes and hours. Essential for EMS and home oxygen.
Formula
Duration (min) = (PSI × Tank Factor) / Flow Rate (L/min)
Inputs
Pulmonology
Convert nasal cannula flow rate (L/min) to FiO₂%. Each L/min adds ~4% above 21% room air baseline. Required input for P/F Ratio and A-a Gradient calculations in ICU and ED.
Formula
FiO₂ ≈ 21% + (4% × L/min)
Inputs