CURB-65 Score Calculator
Calculate the CURB-65 score for assessing pneumonia severity and guiding decisions about hospitalization. Based on Confusion, Urea, Respiratory rate, Blood pressure, and age 65+. Educational reference only.
Formula & Reference
| Variable | Symbol | Formula | Units |
|---|---|---|---|
| CURB-65 Score Calculator | — | CURB-65 = Sum of 5 criteria (0-5 points) | score 0-5 |
Step-by-Step Examples
No confusion, normal urea, RR<30, normal BP, age<65.
- Total = 0
- Low risk category (~0.7% mortality)
- Outpatient treatment often appropriate with this profile
Elevated respiratory rate and age ≥65, other criteria normal.
- Total = 0+0+1+0+1 = 2
- Moderate risk category (~9.2% mortality)
- Often prompts consideration of hospital admission
Confusion present, elevated urea, low blood pressure, age≥65.
- Total = 1+1+0+1+1 = 4
- High risk category (~40% mortality)
- Strong indication for hospitalization, ICU consideration
Real-World Applications
Common Mistakes to Avoid
While useful, clinical judgment must incorporate additional factors (comorbidities, social situation, oxygen saturation, clinical trajectory) beyond the basic score.
CRB-65 (without urea/blood test) is sometimes used in outpatient settings without lab access — know which version applies to your clinical context.
This is an educational reference tool only — pneumonia severity assessment requires evaluation by qualified healthcare providers, not self-diagnosis using this calculator.