Table 1.

24-hour urine stone chemistries used for kidney stone evaluation

Analyte	Units	Normal values (mean±SD) in non-stone formers (Adults)
PH		5.8-6.2
Calcium	mg/d	<250 (F), M300 (M), <4mg/kg or <140mg/g creatinine (both sexes)
Oxalate	mg/d	30-50
Citrate	mg/d	>550 (F), >450 (M)
Uric Acid	mg/d	<750 (F), <800 (M)
Phosphate	mg/d	500-1500
Magnesium	mg/d	50-150
Sulfate	mmol/d	20-80
Ammonia	mmol/d	15-60
Sodium	mmol/d	50-150
Potassium	mmol/d	20-100
Creatinine	mg/kg/d	15-19 (F), 20-24 (M)
Cystine	mg/d	<75
Calcium Oxalate Supersaturation		<8
Calcium Phosphate Supersaturation		0.5-1.5
Uric Acid Supersaturation		0-1

Abbreviations: F, female; GFR, glomerular filtration rate; M, male

Data from University of Chicago Stone Clinic (for adults)

The data as calculated by the Equal2 program