Clinical judgment required. This calculator is a decision-support tool, not a substitute for veterinary consultation.

Anion Gap CalculatorCanineFeline

Calculate the anion gap (AG) from serum electrolytes in dogs and cats. Uses sodium, potassium, chloride, and bicarbonate to compute the difference between measured cations and anions. The anion gap helps classify metabolic acidosis as high anion gap (e.g., ethylene glycol toxicity, diabetic ketoacidosis, lactic acidosis, uremia) versus normal anion gap (hyperchloremic). Species-specific normal ranges: dogs 12–24 mEq/L, cats 13–27 mEq/L. Used for acid-base assessment, metabolic acidosis workup, toxicology evaluation, DKA monitoring, and critical care electrolyte analysis. Common queries: 'anion gap in a dog', 'metabolic acidosis workup', 'high anion gap causes in cats'.

Species

Sodium (Na⁺)

mEq/L

Potassium (K⁺)

mEq/L

Chloride (Cl⁻)

mEq/L

Bicarbonate (HCO₃⁻)

mEq/L

Anion Gap

—mEq/L

12 mEq/L

24 mEq/L

40 mEq/L

Low

Moderate

High