MedVellum
Clinical Atlas OS
Acid-base tool

Anion Gap Calculator

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

Calculator
Type
Bedside
Use
Visible
Guardrails
Clinical Tools

Workbench layout

Calculate first, then interpret the result in context. Assumptions, limitations, and clinical guardrails stay visible beside the tool.

Anion gap

12

Formula: Na - (Cl + HCO3)

Albumin-corrected

12

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.