Urine Anion Gap (non-gap acidosis)
Urine anion gap = urine Na + urine K - urine Cl; negative suggests GI HCO3 loss, positive suggests renal (RTA) cause of NAGMA.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Urine Na
- 40 mEq/L
- Urine K
- 30 mEq/L
- Urine Cl
- 90 mEq/L
Result: UAG -20 (negative: appropriate ammonium excretion, GI bicarbonate loss).
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Urine Na
- Urine K
- Urine Cl
How this is calculated
Goldstein MB, et al. Am J Med Sci. 1986;292(4):198-202. UAG = urine Na + urine K - urine Cl. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.