CURB-65

Pneumonia severity (simplified).

CURB-65

Patient parameters

Adjust values, then click Calculate.

Age

0–120

Respiratory rate

4–60

Systolic blood pressure (mmHg)

30–300

Diastolic blood pressure (mmHg)

30–300

Blood urea nitrogen (mg/dL)

0–1000

New confusion

Results

CURB-65 score: 1 points

What this calculator does

CURB-65 stratifies adults with community-acquired pneumonia to guide disposition. Five binary criteria capture confusion, urea, respiratory rate, blood pressure, and age.

Formula and variables

Displayed formula: CURB-65

The engine evaluates: CURB-65 score (points). Variable names match the input field keys so you can trace each step from entry to output.

How to use this tool

1. Open the CURB-65 and enter your values using the units shown beside each field.
2. Review that inputs are within the typical physiological range before you calculate.
3. Read the result together with the interpretation notes below and your local clinical context.

How to interpret the result

Scores 0–1 often support outpatient care; 2 suggests hospital admission; 3–5 indicate severe illness and higher mortality risk. Always integrate oxygenation, comorbidities, and social support.

Clinical context

Severity scores guide triage and monitoring frequency. They do not replace clinician judgment, serial exams, or escalation when the patient appears unwell despite a low score.

Limitations and disclaimer

This tool supports education and clinical triage only. It does not replace professional medical advice, diagnosis, or treatment. Reference ranges vary by laboratory, age, pregnancy status, and comorbidity. Always confirm critical decisions with institutional protocols and qualified clinicians.