Calcium in Urine Test Test
A calcium in urine test measures the amount of calcium in your urine. Abnormal levels may signal kidney disease, parathyroid disorders, bone disease, or other conditions affecting calcium use.
What this test measures
This test measures the amount of calcium in your urine. Calcium is a mineral mostly stored in bones and teeth, with about 1% in blood. The body carefully controls blood calcium levels through parathyroid hormones, which can affect how much calcium is passed in urine.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
Higher than normal calcium levels in urine may be a sign of many conditions, including: a kidney stone, overactive parathyroid glands (hyperparathyroidism), certain types of cancer (including cancer that spreads to the bones), bone disorders (including Paget's disease of bone and osteoporosis), or sarcoidosis.
Lower-than-normal results
Lower than normal calcium levels in urine may be a sign of many conditions, including: kidney disease, underactive parathyroid glands (hypoparathyroidism), too little vitamin D or magnesium, malabsorption disorder, or malnutrition.
Frequently asked questions
What is a calcium in urine test?
It measures the amount of calcium in your urine. Abnormal levels may signal kidney disease, parathyroid disorders, bone disease, or other conditions.
Why might I need this test?
It helps diagnose kidney stones, check kidney function, or evaluate parathyroid gland problems. It may also be used if you have bone disease or abnormal calcium blood test results.
What do high levels mean?
High urine calcium may be a sign of kidney stones, overactive parathyroid glands, certain cancers, bone disorders like Paget's disease or osteoporosis, or sarcoidosis.
What do low levels mean?
Low urine calcium may be a sign of kidney disease, underactive parathyroid glands, too little vitamin D or magnesium, malabsorption disorder, or malnutrition.
Can diet or medicines affect my results?
Yes. Your diet (especially high-sodium foods), certain supplements (like too much vitamin D), and medicines (such as antacids or some diuretics) can affect urine calcium levels.
Related lab tests
Sources
- MedlinePlus: Calcium in Urine Test — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.