Explore our suite of respiratory calculators designed to simplify pulmonary assessments. From evaluating oxygenation via the PaO2/FiO2 Ratio to predicting lung capacity, these tools assist medical professionals and individuals in understanding respiratory health. Get quick, accurate results for vital metrics.
Formula:
PaO2/FiO2 Ratio Formula
The PaO2/FiO2 Ratio, also known as the P/F Ratio, is a simple index used to assess the severity of lung injury and oxygenation efficiency. It is calculated as:
P/F Ratio = PaO₂ / FiO₂
- PaO₂: Partial pressure of oxygen in arterial blood (in mmHg)
- FiO₂: Fraction of inspired oxygen (expressed as a decimal, e.g., 0.21 for room air, 1.0 for 100% oxygen)