Urine Anion Gap (UAG)
UAG (mEq/L or mmol/L) = urine Na + urine K − urine Cl.
Calculator
How it works
The urine anion gap estimates urinary ammonium excretion indirectly in metabolic acidosis workups.
Limits
Diuretics, vomiting, and timing of collection distort interpretation.
Educational tool only—not for diagnosis or treatment decisions.