SOFA Score Calculator

What is the SOFA Score?

The Sequential Organ Failure Assessment (SOFA) score is a scoring system to determine the extent of a person's organ function or rate of failure. It is used to track a patient's status during the stay in an intensive care unit (ICU) to determine the likelihood of survival.

It consists of 6 key indicators:

  1. Respiratory system (PaO2/FiO2 ratio)
  2. Coagulation system (Platelet count)
  3. Liver (Bilirubin level)
  4. Cardiovascular system (Blood pressure and use of vasopressors)
  5. Central nervous system (Glasgow Coma Scale)
  6. Renal system (Creatinine clearance or urine output)

Each indicator is scored from 0 to 4 based on the degree of abnormality, with a total score ranging from 0 to 24. The higher the score, the more severe the organ dysfunction.

Considerations when using the SOFA Score Calculator:

  • It is meant to be used as a reference only and cannot replace the professional judgment of a clinician.
  • The score needs to be re-evaluated periodically as the patient's condition may change over time.
  • The score results should be analyzed in the context of the patient's overall clinical presentation.
  • The score may not be suitable for certain specific conditions, such as trauma or burns.
  • The actual test results should be used to fill in the corresponding values, rather than relying on estimates.

In summary, the SOFA Score Calculator can provide clinicians with a useful reference, but the final treatment decision should be made by a professional based on a comprehensive assessment of the patient's specific situation.

How to Use the Calculator

Please enter the following information for the patient:



SOFA Score Reference:

Parameter Score Reference
Respiration PaO2/FiO2 > 400 = 0 points
PaO2/FiO2 300-400 = 1 point
PaO2/FiO2 200-300 = 2 points
PaO2/FiO2 100-200 = 3 points
PaO2/FiO2 < 100 = 4 points		 This measures the ratio of arterial oxygen partial pressure (PaO2) to fractional inspired oxygen (FiO2). A lower ratio indicates more severe respiratory dysfunction.
Coagulation Platelets > 150,000 = 0 points
Platelets 100,000-150,000 = 1 point
Platelets 50,000-100,000 = 2 points
Platelets 20,000-50,000 = 3 points
Platelets < 20,000 = 4 points		 This measures the platelet count. A lower platelet count indicates more severe coagulation dysfunction.
Liver Bilirubin < 1.2 mg/dL = 0 points
Bilirubin 1.2-1.9 mg/dL = 1 point
Bilirubin 2.0-5.9 mg/dL = 2 points
Bilirubin 6.0-11.9 mg/dL = 3 points
Bilirubin > 12.0 mg/dL = 4 points		 This measures the bilirubin level. A higher bilirubin level indicates more severe liver dysfunction.
Cardiovascular MAP ≥ 70 mmHg = 0 points
MAP < 70 mmHg = 1 point
Dopamine ≤ 5 or dobutamine (any dose) = 2 points
Dopamine > 5 or epinephrine ≤ 0.1 or norepinephrine ≤ 0.1 = 3 points
Dopamine > 15 or epinephrine > 0.1 or norepinephrine > 0.1 = 4 points		 This measures the cardiovascular dysfunction, based on hypotension (low blood pressure).
Central Nervous System GCS = 15 = 0 points
GCS 13-14 = 1 point
GCS 10-12 = 2 points
GCS 6-9 = 3 points
GCS < 6 = 4 points		 This measures the central nervous system dysfunction, based on the Glasgow Coma Scale (GCS).
Renal Creatinine < 1.2 mg/dL = 0 points
Creatinine 1.2-1.9 mg/dL = 1 point
Creatinine 2.0-3.4 mg/dL = 2 points
Creatinine 3.5-4.9 mg/dL = 3 points
Creatinine > 5.0 mg/dL = 4 points
Urine output < 500 mL/day = 4 points		 This measures the renal dysfunction, based on creatinine level or urine output.
Score Mortality Risk
0-6 Around 10%
7-12 Around 20-50%
13+ Around 50-90%