Acid-base tool

Anion Gap Calculator

Fast bedside calculation for serum anion gap and albumin-corrected anion gap to support metabolic acidosis assessment.

Sodium (mmol/L)Chloride (mmol/L)Bicarbonate (mmol/L)Albumin (g/dL)

Include potassium in calculation

Anion gap

Formula: Na - (Cl + HCO3)

Albumin-corrected

Adds 2.5 for every 1 g/dL albumin below 4

Interpretation

Normal anion gap

Interpret in context of lactate, ketones, and renal failure risk.