Input:   Na   meq/L K   meq/L Cl   meq/L

Result:   Urine AG   meq/L   Decimal Precision: 0 1 2 3

Notes

• The urine anion gap is calculated from the difference between the major measured urinary cations (Na and K) and urinary anions (Cl).
• The normal value on a regular diet is -20 to -50 meq/L due to the appropriate presence of ammonium, which is an unmeasured cation.