Internal Medicine · Critical Care

Anion Gap (with potassium) calculator

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

Clinical inputs

Agk Sodium Mmol L (mmol/L)

Agk Chloride Mmol L (mmol/L)

Agk Bicarbonate Mmol L (mmol/L)

Agk Potassium Mmol L (mmol/L)

Result

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Formula inputs

Agk Sodium Mmol L (mmol/L)Accepted range: 100 to 180
Agk Chloride Mmol L (mmol/L)Accepted range: 70 to 130
Agk Bicarbonate Mmol L (mmol/L)Accepted range: 5 to 45
Agk Potassium Mmol L (mmol/L)Accepted range: 2 to 8

Primary source

Kraut JA, Madias NE. Serum anion gap: its uses and limitations in clinical medicine. Clin J Am Soc Nephrol. DOI: 10.2215/CJN.03020906. PMID: 17267600. Scope: Anion gap with potassium (mEq/L) = (Na + K) − Cl − HCO3. (2007)

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