SOFA Score Calculator

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SOFA Score
Clinical Decision Tool

Assess dysfunction across six organ systems using the Sequential Organ Failure Assessment score.

PaO₂/FiO₂ Ratio The respiratory component of SOFA uses the ratio of arterial oxygen tension to inspired oxygen fraction. Accepted units mmHg Used by SOFA Score Clinical note Use FiO₂ as a decimal when calculating the ratio. Respiratory support affects scoring when the ratio is below 200 mmHg. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Enter the arterial PaO₂ divided by FiO₂.
Respiratory Support Original SOFA scoring requires respiratory support for respiratory scores of 3 or 4. Used by SOFA Score Clinical note Apply the definition used by the treating service and local protocol. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Select whether respiratory support is being provided.
Platelet Count The coagulation component of SOFA is based on the platelet count. Accepted units ×10⁹/L Used by SOFA Score Clinical note Use the value corresponding to the assessment period required by the clinical context. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Enter the measured platelet count.
Choose the unit used for the bilirubin value.
Total Bilirubin The hepatic component of SOFA is based on total serum bilirubin. Accepted units µmol/L mg/dL Used by SOFA Score Clinical note Select the correct unit before calculation. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Enter the measured total bilirubin.
Cardiovascular SOFA Component This component uses mean arterial pressure and the dose of vasoactive medication. Accepted units mmHg micrograms/kg/min Used by SOFA Score Clinical note Use the highest applicable score. Medication names and dose thresholds follow the original SOFA model. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Select the option matching the patient’s blood pressure and vasoactive support.
Glasgow Coma Scale The neurological component of SOFA uses the total Glasgow Coma Scale score. Accepted units points Used by SOFA Score Glasgow Coma Scale Clinical note Clinical factors such as sedation or intubation may complicate assessment and require professional judgement. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Enter the total Glasgow Coma Scale score.
Choose the unit used for the creatinine value.
Serum Creatinine The renal SOFA component can be scored using serum creatinine or urine output. Accepted units µmol/L mg/dL Used by SOFA Score Clinical note When urine output is also entered, MediCalc uses whichever renal criterion produces the higher score. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Enter the measured serum creatinine.
Urine Output Urine output below 500 mL/day or below 200 mL/day can increase the renal SOFA component. Accepted units mL/24 h Used by SOFA Score Clinical note Leave blank when a reliable 24-hour total is unavailable. Reference Vincent JL et al. SOFA score, 1996. Learn more →
Optional. Enter the total urine output over 24 hours when available.
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