SOFA Score Calculator
Calculate the Sequential Organ Failure Assessment (SOFA) score for ICU patients to quantify organ dysfunction.
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How to use this calculator
Six organ systems are each scored 0–4: Respiratory (PaO2/FiO2), Coagulation (platelets), Liver (bilirubin), Cardiovascular (MAP/vasopressors), Central Nervous System (GCS), and Renal (creatinine/urine output). Higher totals mean more organ dysfunction on this scale; a score alone is not a prognosis.
- 1
Gather the patient's current lab values and clinical parameters.
- 2
Select the appropriate score for each of the six organ systems.
- 3
The total SOFA score (0–24) is calculated automatically.
- 4
Compare the total with earlier totals for the same person outside the tool; a higher total means more organ dysfunction on this scale.
Frequently asked questions
How is the total calculated?
You pick a score from 0 to 4 in each of six drop-downs: respiratory, coagulation, liver, cardiovascular, central nervous system and renal. The tool adds the six numbers, so the total ranges from 0 to 24. Nothing is weighted, and the page does not look at raw lab values; the bands are chosen by you.
Does the tool convert lab values into scores for me?
No. Each drop-down lists the value band beside each score, such as a platelet or bilirubin range, and you select the matching one. If the true value sits on a boundary or comes in different units, check it against the printed band before choosing.
What do the options for the respiratory and cardiovascular systems involve?
The respiratory choices pair PaO₂/FiO₂ ranges with a note about ventilation for the two highest scores. The cardiovascular choices combine a mean arterial pressure entry with vasopressor options. The drug and dose wording in those option labels is copied into the page’s selector; this text does not restate or endorse any of it.
Can I enter a change from baseline?
No. The tool scores whatever you select as a single snapshot and has no baseline field. Comparing a score with an earlier one, or with a pre-existing condition, must be done outside the tool.
What does the “Interpretation” line say?
It prints the same fixed sentence for every total: higher totals mean more organ dysfunction on this scale, and a score alone is not a prognosis. The tool does not convert the total into a risk percentage or a predicted outcome.
What happens if no value is chosen?
Each drop-down starts at 0, and a missing or non-numeric selection is counted as 0. This means an omitted system silently contributes nothing, so check that all six selectors reflect the real findings before reading the total.
Does the renal option follow the published table?
The top renal option reads creatinine above 5.0 mg/dL or urine output under 200 mL/day, which matches how the published SOFA table is reproduced in a review at ccforum.biomedcentral.com/articles/10.1186/cc5007/tables/1. The original 1996 paper itself was not opened. The other bands are the figures built into this tool.
Six drop-downs, one total: the mechanics of a SOFA-style sum
Adding six organ-system scores
The calculator is a structured adder. Each organ system has five choices numbered 0 to 4, with the matching measurement band written next to it. The tool converts each selection to a number, sums the six, and prints the total out of 24 together with the individual scores. The measurements behind the bands are respiratory PaO₂/FiO₂, platelet count, bilirubin, mean arterial pressure with vasopressor use, Glasgow Coma Scale, and creatinine or urine output.
What each drop-down is based on
The table names the measurement behind each selector and the number of choices it offers. It describes the structure of the form and does not interpret any value.
| Organ system | Measure the options refer to | Score choices |
|---|---|---|
| Respiratory | PaO₂/FiO₂ (with a ventilation note on upper scores) | 0 to 4 |
| Coagulation | Platelet count | 0 to 4 |
| Liver | Bilirubin | 0 to 4 |
| Cardiovascular | MAP and vasopressor entries | 0 to 4 |
| Central nervous system | Glasgow Coma Scale | 0 to 4 |
| Renal | Creatinine or urine output | 0 to 4 |
Three runs of the calculator
With every selector at 0 the total is 0 out of 24. Choosing 2, 1, 0, 1, 1 and 2 for the systems in the order above gives 7 with the same Interpretation sentence. Choosing 3, 2, 1, 3, 2 and 3 gives 14, and selecting 4 in every system gives the maximum of 24. These totals came directly from running the tool. The sum alone does not show which system contributes most, which is why the page lists the individual scores too.
Beyond the sum
A total is a snapshot and discards which organs are affected. The page prints one fixed Interpretation sentence: higher totals mean more organ dysfunction on this scale, and a score alone is not a prognosis. The tool gives no risk percentage. Differences between consecutive totals, a baseline from before the illness and the clinical picture are all outside what the form handles.
Appropriate use
This page is general information, not medical advice, and a clinician governs any decision. It suits learning how a point score is assembled. It is not for clinical decisions: it must not be used to decide a patient’s treatment, triage or level of care, and it does not replace clinical judgement or local protocols. Teams that use SOFA in practice should follow their own approved scoring sheet and data sources, and have the entries checked by a second clinician.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →