CURB-65 Score (Pneumonia Severity) — free guideline decision tool
Calculate the CURB-65 score to grade community-acquired pneumonia severity and guide admission.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Confusion (new) | No |
|---|---|
| Urea > 7 mmol/L (BUN > 19 mg/dL) | No |
| Respiratory rate ≥ 30/min | No |
| BP: SBP < 90 or DBP ≤ 60 mmHg | No |
| Age ≥ 65 | No |
→CURB-650/5
- Disposition：Low (consider outpatient)
- 30-day mortality (approx.)：0–1: low · 2: intermediate · 3–5: high
| Confusion (new) | Yes |
|---|---|
| Urea > 7 mmol/L (BUN > 19 mg/dL) | Yes |
| Respiratory rate ≥ 30/min | Yes |
| BP: SBP < 90 or DBP ≤ 60 mmHg | Yes |
| Age ≥ 65 | Yes |
→CURB-655/5
- Disposition：Severe (assess for ICU)
- 30-day mortality (approx.)：0–1: low · 2: intermediate · 3–5: high
Common questions
What is CURB-65 Score (Pneumonia Severity)?
Calculate the CURB-65 score to grade community-acquired pneumonia severity and guide admission.
How is CURB-65 Score (Pneumonia Severity) calculated? What is the core formula?
1 point each: Confusion, Urea > 7 mmol/L, RR ≥ 30, BP (SBP < 90 / DBP ≤ 60), age ≥ 65. 0–1 low, 2 moderate, 3–5 severe. Award 1 point each for Confusion, Urea > 7 mmol/L (BUN > 19 mg/dL), RR ≥ 30, low BP (SBP < 90 or DBP ≤ 60), and age ≥ 65.
When is CURB-65 Score (Pneumonia Severity) used?
Severity assessment and disposition in community-acquired pneumonia.
How should CURB-65 Score (Pneumonia Severity) results be interpreted?
0–1 often outpatient-capable; 2 consider short stay/observation; ≥ 3 higher severity — assess for inpatient/ICU with oxygenation and comorbidities.
What are the key clinical points for CURB-65 Score (Pneumonia Severity)?
0–1: often suitable for outpatient care. ≥ 3: assess for ICU. Use with oxygenation, comorbidity and social factors.
What are the limits and cautions when using CURB-65 Score (Pneumonia Severity)?
Does not capture hypoxaemia, multilobar disease, or social supports — override when needed. Urea/BUN units differ by lab; convert carefully. Use alongside PSI/PORT and clinical judgement for disposition. For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does CURB-65 Score (Pneumonia Severity) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is CURB-65 Score (Pneumonia Severity) calculated in practice? Can you show a worked example?
Inputs: Confusion (new) No, Urea > 7 mmol/L (BUN > 19 mg/dL) No, Respiratory rate ≥ 30/min No, BP: SBP < 90 or DBP ≤ 60 mmHg No, Age ≥ 65 No → Result: CURB-65 0 /5（Disposition: Low (consider outpatient), 30-day mortality (approx.): 0–1: low · 2: intermediate · 3–5: high） Inputs: Confusion (new) Yes, Urea > 7 mmol/L (BUN > 19 mg/dL) Yes, Respiratory rate ≥ 30/min Yes, BP: SBP < 90 or DBP ≤ 60 mmHg Yes, Age ≥ 65 Yes → Result: CURB-65 5 /5（Disposition: Severe (assess for ICU), 30-day mortality (approx.): 0–1: low · 2: intermediate · 3–5: high）
Run CURB-65 Score (Pneumonia Severity) now
Calculate the CURB-65 score to grade community-acquired pneumonia severity and guide admission.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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