P/F Ratio Calculator
PaO₂ / FiO₂ Oxygenation Index
mmHg
% or decimal
Enter PaO₂ and FiO₂ values to see the clinical assessment.
Calculated P/F Ratio
0
Label
Description
Berlin ARDS Criteria
Mild ARDS
201 – 300
Moderate ARDS
101 – 200
Severe ARDS
≤ 100
Note: Diagnosis of ARDS requires PEEP ≥ 5 cmH₂O. This tool is for professional informational purposes and is not a substitute for clinical judgment.