🧪 Albumin-Corrected Anion Gap
Correct the anion gap for hypoalbuminaemia.
Albumin-Corrected Anion Gap
Measured anion gap (mmol/L)
Albumin (g/dL)
When to use
Avoid missing a high-anion-gap acidosis when albumin is low.
How it works
Corrected AG = AG + 2.5 × (4.0 − albumin g/dL). Reference ~8–12 mmol/L.
Key points
- Each 1 g/dL fall in albumin lowers AG by ~2.5.
- Hypoalbuminaemia can mask a metabolic acidosis.
- Pair with the delta ratio for mixed disorders.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.