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Simplified SOFA Score (Organ Failure) Calculator

SOFA — sequential organ failure assessment in critical care.

Calculates a simplified SOFA score from six organ system parameters to assess severity of illness and predict ICU mortality.

By Dr. Helena Ortiz

Published Jun 7, 2026 Last reviewed Apr 25, 2026 1 min read

Inputs

Respiratory (PaO₂/FiO₂): >400=0, 300-400=1, 200-300=2, 100-200=3, <100=4

Coagulation (platelets): >150=0, 101-150=1, 51-100=2, 21-50=3, ≤20=4

Liver (bilirubin): <1.2=0, 1.2-2=1, 2-6=2, 6-12=3, >12=4

Cardiovascular (MAP or vasopressors): 0–4

CNS (GCS): 15=0, 13-14=1, 10-12=2, 6-9=3, <6=4

Renal (creatinine mg/dL): <1.2=0, 1.2-2=1, 2-3.5=2, 3.5-5=3, >5=4

Enter values and click Calculate to see results.

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SOFA = respiratory + coag + liver + cardiovascular + CNS + renal (0–4 each)

Calculates a simplified SOFA score from six organ system parameters to assess severity of illness and predict ICU mortality.

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About the author

Senior Reviewer, Science & Engineering

Physicist and standards reviewer who checks every formula on the site before publish.