{"id":"urine-calcium-creatinine-ratio","name":"Urine Calcium-to-Creatinine Ratio","shortName":"Urine Ca/Cr ratio","aliases":["Calcium/Creatinine Ratio","Urine Ca/Cr","Calcium/Creatinine Ratio, Random Urine","Ca/Cr Ratio","Calcium Creatinine Ratio, Urine","Calcium/Creat Ratio, Random, U","Calcium/Creatinine Ratio, Urine","Calcium to Creatinine Ratio, Urine","Urinary Calcium/Creatinine Ratio","Calcium/Creatinine, Random Urine","Calcium/Creatinine, Urine","Urine Calcium/Creatinine Ratio"],"abbreviations":["Ca/Cr","UCa/Cr"],"loinc":[{"code":"9321-1","primary":true},{"code":"13717-4","primary":false},{"code":"24518-3","primary":false},{"code":"50839-0","primary":false}],"specimen":"urine","units":[{"ucum":"mg/mg","display":"mg/mg"},{"ucum":"mg/g","display":"mg/g"}],"referenceRanges":[{"population":"18–83","low":0.05,"high":0.27,"unit":"mg/mg","unitDisplay":"mg/mg","note":"Mayo Clinic Laboratories gives one interval for adults 18-83 years of both sexes and has no values over 83 years. ARUP splits adults by sex: 20-240 mg/g in men and 20-300 mg/g in women (0.02-0.24 and 0.02-0.30 mg/mg), so labs differ.","sources":[{"title":"Calcium/Creatinine Ratio, Random, Urine (Mayo test CACR3)","url":"https://www.testcatalog.org/show/CACR3","publisher":"Mayo Clinic Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Calcium in one urine sample compared with creatinine, which adjusts for how dilute the urine is. It is used for stone and bone work-ups in adults and children.","url":"https://bloodtesttracker.com/markers/urine-calcium-creatinine-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}