Sepsis Calculator - Sepsis-3 Criteria (qSOFA + SOFA)

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The qSOFA screen uses only vital signs and mental status - no blood tests needed.
Any GCS below 15 scores 1 point. Includes confusion, agitation, or reduced consciousness.
Rate >= 22 breaths/min scores 1 point on qSOFA.
breaths/min
SBP <= 100 mmHg scores 1 point on qSOFA.
mmHg
SOFA assesses six organ systems. An acute increase of 2 or more points from baseline indicates organ dysfunction consistent with sepsis.
Partial pressure of arterial oxygen divided by fraction of inspired oxygen. Normal >= 400.
mmHg
Mechanical ventilation affects respiratory sub-score when PaO2/FiO2 < 200.
Thrombocytopenia scores up to 4 points. Normal >= 150.
x10³/uL
Total GCS (3-15). Reduced consciousness scores up to 4 points. Normal = 15.
MAP = (SBP + 2 x DBP) / 3. Normal >= 70 mmHg.
mmHg
Vasopressor agents used to maintain MAP. Higher doses score more points.
Total serum bilirubin. Normal < 1.2 mg/dL.
mg/dL
Serum creatinine. Normal < 1.2 mg/dL. If urine output is lower, select it below.
mg/dL
If measured urine output is lower than creatinine-based score, urine output takes precedence.
Septic shock requires serum lactate > 2 mmol/L despite adequate fluid resuscitation plus ongoing vasopressor need.
mmol/L
qSOFA ScoreLow Sepsis Risk
0points

Bedside screen (0-3); score >= 2 flags high mortality risk from infection

SOFA Total Score0points
Respiratory (SOFA)0pts
Coagulation (SOFA)0pts
Liver (SOFA)0pts
Cardiovascular (SOFA)0pts
Neurological (SOFA)0pts
Renal (SOFA)0pts
Septic ShockNot met
Clinical AssessmentLow sepsis risk by current parameters
Respiratory0
Coagulation0
Liver0
Cardiovascular0
Neurological0
Renal0

qSOFA 0/3 and SOFA 0 - low current sepsis risk.

  • qSOFA score of 0/3 is negative (< 2), suggesting lower immediate mortality risk from sepsis at this time. Reassess if clinical status changes.
  • SOFA total of 0/24 does not currently meet the organ dysfunction threshold for sepsis diagnosis (requires acute increase >= 2 from baseline).
  • These scores are clinical decision-support tools. Sepsis-3 diagnosis requires (1) suspected or confirmed infection, (2) life-threatening organ dysfunction, and (3) exclusion of non-infectious causes of organ dysfunction.

Next stepContinue monitoring. If clinical status worsens or new infection signs emerge, reassess with full SOFA.

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