Critical Care · Anesthesiology

Base Excess (Siggaard-Andersen) calculator

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

Clinical inputs

Be Ph (pH)

Be Bicarbonate Mmol L (mmol/L)

Result

Complete all required inputs to calculate the score.

Formula inputs

Be Ph (pH)Accepted range: 6.8 to 7.8
Be Bicarbonate Mmol L (mmol/L)Accepted range: 5 to 45

Primary source

Siggaard-Andersen O. The acid-base status of the blood. Munksgaard. DOI: 10.1159/000408741. PMID: 4607114. Scope: Standard base excess (mmol/L) from arterial pH and bicarbonate using Siggaard-Andersen approximation. (1974)

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