Anion Gap
Serum anion gap: Na − (Cl + HCO₃).
What this calculator does
This tool calculates the anion gap from your sodium, chloride, and bicarbonate levels. The anion gap is a derived value that can point to certain types of metabolic disturbances.
What your result means
The result is in mEq/L. Abnormal values may suggest an imbalance that needs further testing. Interpretation depends on your full lab results and clinical picture; your doctor can explain.
This is not medical advice. A healthcare provider should interpret results in your context.
Sodium (mEq/L)
Chloride (mEq/L)
Bicarbonate (mEq/L)
Key terms
- Anion gap
- Sodium − (chloride + bicarbonate); a derived value that can suggest certain acid–base or metabolic disorders.
- mEq/L
- Milliequivalents per litre; a unit for electrolyte concentrations.
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This tool is for educational and reference use only. It does not constitute medical advice. Always consult a healthcare professional for medical decisions.