Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Pulmonology
Calculate pack-years from cigarettes per day and years smoked. Useful for documenting smoking burden and lung cancer screening discussions.
Formula
Pack-years = (cigarettes per day / 20) x years smoked
Inputs
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