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qSOFA Score Calculator

qSOFA ("quick SOFA") is a three-item bedside score from the Sepsis-3 definitions. In a patient with suspected infection, a score of 2 or more identified a group at higher risk of poor outcomes in the original studies. Each item takes seconds to assess and needs no laboratory results.

Formula: One point each: respiratory rate 22/min or more · altered mentation (GCS below 15) · systolic blood pressure 100 mmHg or below.

Enter the values or tick the options above — the result updates automatically.

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How to interpret the result

qSOFAReading
0–1Below the threshold used in the Sepsis-3 work — but not reassurance on its own.
2–3The range associated with higher risk of poor outcomes in patients with suspected infection in the original studies.

qSOFA needs the mentation item, which uses the Glasgow Coma Scale — anything below a perfect 15 scores the point. For pneumonia severity specifically, see the CURB-65 calculator.

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Frequently asked questions

What does qSOFA stand for?

Quick Sequential Organ Failure Assessment. It is the bedside, no-laboratory companion to the full SOFA score, introduced with the Sepsis-3 definitions in 2016.

Does a qSOFA of 2 or more diagnose sepsis?

No. It flags a higher-risk group among patients with suspected infection. Sepsis is defined by a rise in the full SOFA score showing organ dysfunction, and diagnosis remains a clinical judgment.

Can a patient with qSOFA 0 still have sepsis?

Yes. The score has limited sensitivity, and later guidance specifically cautions against using qSOFA alone as a screening test. Clinical concern should always win over a reassuring score.

Educational use only. This calculator is an aid to learning and does not replace clinical judgment, local reference ranges, or specialist advice. Always interpret a result alongside the patient, the full laboratory picture, and your laboratory's own reference ranges.