SOFA Score Calculator
Enter values for 6 organ systems (respiratory, coagulation, liver, cardiovascular, neurological, renal) to calculate the SOFA score and estimate ICU mortality risk.
Use the SOFA Score Calculator
For educational use only. Not a substitute for clinical judgment. All SOFA scores must be interpreted by qualified clinicians in the context of the full patient presentation.
Organ System Parameters
Normal: 150–400 × 10³/μL
Normal: 0.1–1.2 mg/dL
Normal: 0.6–1.2 mg/dL
Leave blank to score by creatinine only
Fill in the organ system values
and click Calculate.
Total SOFA Score
Subscore Breakdown
Clinical Notes
SOFA Score Reference Table
| System | 0 pts | 1 pt | 2 pts | 3 pts | 4 pts |
|---|---|---|---|---|---|
| Respiratory PaO₂/FiO₂ |
≥ 400 | 300–399 | 200–299 | 100–199 + MV | < 100 + MV |
| Coagulation Platelets ×10³/μL |
≥ 150 | < 150 | < 100 | < 50 | < 20 |
| Liver Bilirubin mg/dL |
< 1.2 | 1.2–1.9 | 2.0–5.9 | 6.0–11.9 | ≥ 12.0 |
| Cardiovascular MAP / Vasopressors |
MAP ≥ 70 | MAP < 70 | Dopa ≤ 5 or Dobu | Dopa > 5 or E/NE ≤ 0.1 | Dopa > 15 or E/NE > 0.1 |
| Neurological GCS |
15 | 13–14 | 10–12 | 6–9 | < 6 |
| Renal Creatinine mg/dL |
< 1.2 | 1.2–1.9 | 2.0–3.4 | 3.5–4.9 or UO < 500 | ≥ 5.0 or UO < 200 |
Summary
The Sequential Organ Failure Assessment (SOFA) score quantifies the degree of organ dysfunction in critically ill patients across six physiological systems: respiratory (PaO2/FiO2 ratio), coagulation (platelets), liver (bilirubin), cardiovascular (mean arterial pressure and vasopressors), central nervous system (Glasgow Coma Scale), and renal (creatinine or urine output). Developed by Vincent et al. in 1996, it was originally designed to describe morbidity in ICU patients rather than predict mortality; however, serial SOFA scores are strongly associated with ICU and hospital mortality. A SOFA score ≥ 2 points above baseline is also the key criterion in the Sepsis-3 consensus definition of sepsis.
How it works
- Select the PaO2/FiO2 ratio range for the respiratory system (higher ratio = better oxygenation).
- Enter the platelet count (×10³/μL) for coagulation assessment.
- Enter the serum bilirubin (mg/dL) for liver function.
- Select the cardiovascular status (MAP and vasopressor requirements).
- Select the Glasgow Coma Scale (GCS) score for neurological status.
- Enter the serum creatinine (mg/dL) or select if the patient is anuric/oliguric.
- Click Calculate to get the total SOFA score, per-system subscores, and an estimated mortality range.
Use cases
- Quantify organ dysfunction severity on ICU admission and track trajectory over time.
- Apply the Sepsis-3 definition: a SOFA increase ≥ 2 from baseline indicates organ dysfunction due to infection.
- Estimate ICU and hospital mortality to guide goals-of-care conversations.
- Communicate patient acuity between clinical teams using a standardized, reproducible score.
- Support triage decisions during mass-casualty events or resource-limited settings.
- Benchmark ICU performance and case-mix adjustment in quality-improvement research.
- Use the quick SOFA (qSOFA) mental model when full labs are unavailable (this tool computes full SOFA).
- Document baseline organ function at ICU admission for serial comparison.