Respiratory and pulmonology tools including A-a gradient, FiO2 conversion, P/F ratio, oxygen tank duration, SpO2-to-PaO2 conversion, and the Asthma Control Test. Essential for managing respiratory conditions and ventilator settings.
This category currently includes 6 tools, including FiO₂ Conversion, P/F Ratio, and O₂ Tank Duration.
These resources are built for clinicians, trainees, and medically informed patients who need fast bedside calculations. Use the results as decision support and pair them with full clinical context and local guidelines.
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.
Calculate the P/F ratio to classify ARDS severity by Berlin criteria. Mild: 200–300 (27% mortality). Moderate: 100–200 (32%). Severe: <100 (45%). Normal P/F is 400–500.
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.
Calculate pack-years from cigarettes per day and years smoked. Useful for documenting smoking burden and lung cancer screening discussions.
Calculate the Asthma Control Test score to assess asthma control over the past 4 weeks.
Classify COPD severity using 2024 GOLD spirometric stages (GOLD 1–4) and ABE exacerbation grouping. Guides inhaler step-up therapy, pulmonary rehabilitation, and oxygen therapy decisions.