SOFA Score Calculator (Sequential Organ Failure Assessment)

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Ratio of arterial oxygen partial pressure (mmHg) to fractional inspired oxygen. Use worst value in the 24-hour period. Bands follow the original Vincent 1996 / Sepsis-3 table exactly: a ratio sitting on a boundary value (400, 300, 200, 100) belongs to the lower-scoring band.
Platelet count in thousands per microliter (x10^3/uL). Use the lowest value in the 24-hour period.
Total serum bilirubin in mg/dL. Use the highest value in the 24-hour period.
Mean arterial pressure (MAP) and vasopressor requirements. Vasopressor doses are in mcg/kg/min. Use worst hemodynamic status in 24 hours.
Glasgow Coma Scale score. Use the lowest GCS in the 24-hour period. For sedated patients, use the estimated GCS prior to sedation.
Serum creatinine in mg/dL or 24-hour urine output in mL. Use the worst value in the 24-hour period.
SOFA ScoreLow risk (<10% mortality)
0/ 24

Total SOFA score (sum of all six organ system scores, range 0-24)

Respiratory0pts
Coagulation0pts
Liver0pts
Cardiovascular0pts
CNS0pts
Renal0pts
Estimated ICU Mortality<10%
Organs with score >= 30
0 pts
Low risk<6Moderate6-9High risk9-12Severe12+
Respiratory0
Coagulation0
Liver0
Cardiovascular0
CNS0
Renal0

SOFA score 0 - estimated ICU mortality <10%.

  • No organ systems have reached severe dysfunction (score >= 3) at this time.
  • A SOFA score increase of 2 or more points from baseline is used by the Sepsis-3 definition to identify organ dysfunction attributable to infection.
  • Serial SOFA scoring every 24-48 hours is more informative than a single value: an increasing score over the first 48 hours is associated with mortality above 50%, while a decreasing trend indicates improvement.

Next stepSOFA is a prognostic and monitoring tool, not a standalone treatment guide. Clinical decisions should integrate hemodynamic status, infection source control, and patient trajectory alongside the SOFA score.

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