P/F Ratio

Name: P/F Ratio
Creator: Daniel Diaz-Gil, MD
Keywords: P/F ratio, PaO2, FiO2, ARDS, Berlin, oxygenation, hypoxemia, pulmonology, pediatric

Calculates PaO2/FiO2 ratio with Berlin ARDS severity classification

Clinically Verified· 5 tests

For educational and informational purposes only. Verify all results before clinical application.

PaO2 (mmHg) *

mmHg

FiO2 (%) *

References

ARDS Definition Task Force. Acute respiratory distress syndrome: the Berlin Definition. JAMA. 2012;307(23):2526-2533.[DOI]
Khemani RG, et al. Pediatric Acute Respiratory Distress Syndrome: Definition, Incidence, and Epidemiology (PALICC-2). Pediatr Crit Care Med. 2023;24(12 Suppl 2):S28-S41.[DOI]

Reviewed by Daniel Diaz-Gil, MD · Last updated March 2026

Medical disclaimer

This tool is for educational and informational purposes only. It is not a substitute for professional clinical judgment. Always independently verify results before making clinical decisions.

Professional Resources — Tools used by pediatricians for respiratory assessment

Kendig's Disorders of the Respiratory Tract in ChildrenComprehensive pediatric pulmonology reference~$180via Amazon Pediatric Pulse OximeterFingertip pulse oximeter suitable for pediatric patients~$30via Amazon