SOFA Score Calculator
Calculate the Sequential Organ Failure Assessment (SOFA) score for ICU patients to quantify organ dysfunction.
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How to use this calculator
Six organ systems are each scored 0–4: Respiratory (PaO2/FiO2), Coagulation (platelets), Liver (bilirubin), Cardiovascular (MAP/vasopressors), Central Nervous System (GCS), and Renal (creatinine/urine output). Higher scores indicate greater dysfunction.
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Gather the patient's current lab values and clinical parameters.
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Select the appropriate score for each of the six organ systems.
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The total SOFA score (0–24) is calculated automatically.
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Track SOFA scores over time — rising scores indicate worsening organ failure.
Frequently asked questions
What is the SOFA score used for?
The SOFA score quantifies organ dysfunction severity in critically ill patients. It was originally developed to describe the extent of organ failure in sepsis patients and is now widely used in ICUs to monitor disease progression and predict mortality.
What does a SOFA score of 2 or more mean?
According to the Sepsis-3 definition, an acute change in total SOFA score of 2 or more points due to infection is associated with a mortality risk greater than 10% and is used to diagnose organ dysfunction in sepsis.
How is SOFA different from qSOFA?
qSOFA (quick SOFA) is a simplified 3-point bedside tool (altered mentation, respiratory rate ≥22, systolic BP ≤100) used to rapidly identify patients at risk outside the ICU. Full SOFA requires lab values and is used for comprehensive ICU assessment.
Does a higher SOFA score always mean a worse outcome?
Higher scores correlate with higher mortality risk at the population level, but individual outcomes depend on the underlying cause, treatment response, and patient baseline. Serial SOFA measurements are more informative than a single score.
SOFA Score Calculator — Sequential Organ Failure Assessment
What Is the SOFA Score?
The Sequential Organ Failure Assessment score was developed by the European Society of Intensive Care Medicine in 1994 to describe the natural history of organ failure in septic patients. It scores six organ systems — respiratory, coagulation, liver, cardiovascular, central nervous system, and renal — each on a 0–4 scale. A total score of 0–24 provides a quantitative picture of how severely a patient's organs are failing.
SOFA in the Sepsis-3 Definition
The 2016 Sepsis-3 consensus redefined sepsis as life-threatening organ dysfunction caused by a dysregulated host response to infection, operationalised as an acute SOFA score increase of ≥2 points. This replaced older definitions based on SIRS criteria and made the SOFA score a cornerstone of modern sepsis diagnosis and research.
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