APACHE IV Score Calculator

APACHE IV Score Calculator

ICU severity & predicted hospital mortality  ·  For professional use only

Demographics & admission

Age (years)

Admission source Medical ICU Elective postoperative Emergency surgery

Chronic health None / elective post-op Moderate (COPD, CKD stage III) Severe (immunocompromise, metastasis)

Acute physiology (APS) 0–10  (mild) 11–25 (moderate) 26–40 (severe) >40  (critical)

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Physiological measurements

PaO₂ / FiO₂ ratio

Creatinine (mg/dL)

Bilirubin (mg/dL)

Heart rate (bpm)

Respiratory rate

Temperature (°C)

Hematocrit (%)

WBC (×10³/µL)

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APACHE IV score

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Predicted mortality

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Risk category

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Score range 0–252  ·  All calculations run locally in your browser  ·  No patient data is stored or transmitted
APACHE® is a registered trademark. This tool is for educational & professional reference only.