Pneumonia · Severity factors
CURB-65
Count five prognostic factors described for adults with community-acquired pneumonia.
Patient factors
Select one answer per row
Private by design. Values are calculated on this device and are not saved or sent to analytics.
Result
Complete all factors
The score and its interpretation band will appear here.
Evidence packet
What this tool is based on
This versioned record keeps the citations, equation or decision rule, units, test coverage, intended population, and exclusions attached to the tool.
How evidence review works →Adults with community-acquired pneumonia after clinical diagnosis and initial assessment.
One point each for confusion, urea >7 mmol/L, respiratory rate ≥30/min, low blood pressure, and age ≥65.
Urea threshold is >7 mmol/L; an approximate BUN equivalent (>19 mg/dL) is displayed for recognition.
All five factors, incomplete state, maximum score, and three interpretation bands.
Do not skip
Limitations and exclusions
- Not a disposition order.
- Does not replace oxygenation, organ dysfunction, severe-CAP criteria, comorbidity, social support, or goals of care.
- Use caution outside the community-acquired pneumonia population.
- BUN conversion is an approximation; use the stated urea threshold when available.
One clearly labeled, contextually relevant sponsor may support this reference area. Sponsorship will never interrupt inputs, obscure results, influence formulas, or imply clinical endorsement.
About this tool
CURB-65 Pneumonia Severity Calculator
Use this CURB-65 calculator to total confusion, urea, respiratory rate, blood pressure, and age criteria for community-acquired pneumonia severity review.
The score supports risk assessment but does not replace clinical judgment, oxygenation, comorbidities, social factors, or current pneumonia guidance.