Anion Gap Calculator

A quick check for metabolic acidosis. Compute the gap and see the albumin-corrected value.

Sodium (mEq/L)

Chloride (mEq/L)

Bicarbonate HCO₃ (mEq/L)

Albumin (g/dL, optional)

Used for the corrected gap.

Formula
Anion gap = Na⁺ − (Cl⁻ + HCO₃⁻)

Corrected = gap + 2.5 × (4.5 − albumin)

Reference: 3–11 mEq/L typical.
A high gap suggests unmeasured anions (ketones, lactate, toxins).

🔍 Quick screen

Spot high-gap metabolic acidosis.

📈 Albumin-corrected

Adjusts for low protein levels.

🧩 Clear status

Normal vs elevated at a glance.

📝 Lab friendly

Standard mEq/L inputs.

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