Calculator

Enter electrolytes and calculate the anion gap (with potassium, optional), the anion gap without potassium, and the delta gap.

mEq/L
mEq/L (leave blank to compute “No K” only)
mEq/L
mEq/L
Tip: K is optional; “No K” is commonly used.
Formulas

Anion Gap = (Na+ + K+) − (Cl- + HCO3-)

Anion Gap (No K) = Na+ − (Cl- + HCO3-)

Delta Gap = (Anion Gap (No K) − 12)