The Anion Gap calculator provides a way to assess metabolic acidosis by analyzing the concentrations of sodium, chloride, and bicarbonate in the blood. Here's how it works:

You start with three key inputs, measured in mmol/L:
- Sodium: Typically falls within a range of 120 to 160.
- Chloride: Ranges from 70 to 130.
- Bicarbonate: Generally between 10 and 40.

With these values, the anion gap is determined using the formula:
Anion Gap = Sodium - (Chloride + Bicarbonate)

This simple calculation yields an output, the anion gap, which is measured in mmol/L and usually falls within a physiological range, though theoretically it can extend from 0 to 10,000.

Interpreting the anion gap provides valuable clinical insights:
- A normal anion gap is typically between 8 and 12 mmol/L. This range suggests there are no significant unmeasured anions affecting the blood plasma.
- A high anion gap, generally above 12 mmol/L, may signal conditions such as ketoacidosis, lactic acidosis, renal failure, or the ingestion of particular toxins like methanol or ethylene glycol.
- A low anion gap is less frequent and could be linked to hypoalbuminemia, hypercalcemia, or other more rare conditions.

By entering the values for sodium, chloride, and bicarbonate into the calculator, you can compute the anion gap and interpret the results to identify possible metabolic disturbances based on these guidelines.

The Anion Gap Calculator measures the difference between cations (Na⁺) and anions (Cl⁻ + HCO₃⁻) in blood to evaluate metabolic acidosis. It identifies normal, elevated, or low anion gaps, aiding in diagnosing acid-base disorders.

Serum Anion Gap