SOFA Score — Free Online Calculator
Organ System Scores
SOFA Score
0
< 10% mortality
About This Calculator
The Sequential Organ Failure Assessment (SOFA) score is used in the ICU to track the extent of organ dysfunction across six organ systems. It is calculated daily to assess the severity of organ failure and predict ICU mortality. A SOFA score ≥ 2 with suspected infection meets the Sepsis-3 definition of sepsis.
Formula
Interpretation
| SOFA Score | Estimated Mortality |
|---|---|
| 0 – 6 | < 10% |
| 7 – 9 | 15–20% |
| 10 – 12 | 40–50% |
| ≥ 13 | > 80% |
References
Frequently Asked Questions
How is the SOFA score used to diagnose sepsis?
Under the Sepsis-3 definition, sepsis is defined as a SOFA score increase of ≥ 2 points from baseline in the setting of suspected infection. This replaced the older SIRS-based definition.
How often should the SOFA score be calculated?
The SOFA score should be calculated daily in ICU patients to track organ dysfunction trends. A rising SOFA score suggests worsening organ failure and is associated with increasing mortality.
What is the difference between SOFA and qSOFA?
SOFA requires laboratory data (PaO2/FiO2, platelets, bilirubin, creatinine) and is used in the ICU. qSOFA uses only bedside clinical criteria (respiratory rate, mental status, blood pressure) and is designed for rapid screening outside the ICU.
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⚠ Medical Disclaimer
This tool is for educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for clinical decisions.