Critical Care · Internal Medicine

APACHE IV (simplified acute physiology score) calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Ap4 Age Years (years)

Ap4 Temperature C (°C)

Ap4 Map Mmhg (mmHg)

Ap4 Heart Rate (bpm)

Ap4 Respiratory Rate (/min)

Ap4 Sodium Mmol L (mmol/L)

Ap4 Creatinine Mg Dl (mg/dL)

Result

Complete all required inputs to calculate the score.

Formula inputs

Ap4 Age Years (years)Accepted range: 18 to 100
Ap4 Temperature C (°C)Accepted range: 25 to 45
Ap4 Map Mmhg (mmHg)Accepted range: 40 to 200
Ap4 Heart Rate (bpm)Accepted range: 30 to 220
Ap4 Respiratory Rate (/min)Accepted range: 4 to 60
Ap4 Sodium Mmol L (mmol/L)Accepted range: 100 to 180
Ap4 Creatinine Mg Dl (mg/dL)Accepted range: 0.1 to 15

Primary source

Zimmerman JE et al. Acute Physiology and Chronic Health Evaluation (APACHE) IV. Crit Care Med. DOI: 10.1097/01.CCM.0000230237.01723.3E. PMID: 16915124. Scope: Educational simplified APACHE IV acute physiology point sum using age and common ICU vital/laboratory bands. (2006)

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