qSOFA Score Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

Share Print Save

In acute care, a score can support a rapid shared language, but it cannot replace the patient in front of you. qSOFA Score Calculator calculates the specific bedside score or index from the fields shown in this tool.

What this calculator does

qSOFA Score Calculator uses Respiratory rate, Systolic BP, and Altered mentation to produce the qsofa score used by this calculator. It only uses the fields shown in this calculator; it does not silently add tests, diagnoses, symptoms, or clinical variables that are absent from the interface. Uses standard health-calculator relationships where a stable equation exists; complex or policy-dependent tools expose assumptions/points so the result can be checked against the current clinical or public-health source.

How to use it

Enter or select Respiratory rate, Systolic BP, and Altered mentation. Use the actual observations or labs from the assessment time point intended by the score. If an input is unknown, it is better to leave the calculation unresolved than to invent a value.

How the calculation works

One point is assigned for respiratory rate at least 22/min, systolic blood pressure at or below 100 mmHg, and altered mentation. The three items are summed for a 0–3 qSOFA score.

Example

Using the calculator’s prefilled demonstration values, the primary output is 0 points, labeled “qSOFA score”; Maximum is 3. That sample is useful for checking the calculation path, but real interpretation should use verified measurements from the same clinical or study context.

How to interpret the result

A score of 2 or 3 can identify a patient with infection who may be at higher risk of poor outcome, but a low score does not make sepsis unlikely enough to stop evaluation when clinical concern is present.

Limitations and notes

qSOFA is not the Sepsis-3 definition and should not be used alone to rule sepsis in or out. Current sepsis guidance favors other tools such as NEWS/NEWS2, MEWS, or SIRS over qSOFA as a single hospital screening tool, while emphasizing clinical assessment and organ dysfunction.