Calcium - urine

What is Calcium - Urine?

Calcium - urine is a laboratory test performed to measure the amount of calcium in a person's urine. The calcium is measured as a concentration of calcium ions (Ca2+) in the urine. The result of the test provides an indication of the amount of calcium being produced and excreted in the urine.


No special preparation is required before having a urine calcium test. Your doctor may ask that you have the test done first thing in the morning, as certain medications and supplements can affect calcium levels.


The procedure for having a urine calcium test is simple and non-invasive. First, you will be asked to provide a urine sample in a sterile container. The sample will then be sent to a laboratory for analysis. Urine calcium tests usually take a few days to get the results.


  • Random Urine Calcium Test – a single urine sample is taken at any time of the day.
  • 24-Hour Urine Calcium Test – urine samples are taken at specific intervals throughout a 24-hour period.


Urine calcium tests are considered safe and simple procedures with no risk of harm. There is always a small risk of contamination of the sample and inaccurate readings as a result. If a urine calcium test is to be done multiple times, your doctor may recommend using a preservative in the container to reduce the risk of contamination.

Why is the Test Done?

The urine calcium test is done to measure the levels of calcium in the urine. It is used to help diagnose conditions such as calcium malabsorption, calcium kidney stones, hypercalcemia, hypocalcemia, or certain types of bone diseases. It may also be done to monitor calcium levels in people with conditions such as kidney failure or cancer.

When is the Test Ordered?

Your doctor may order a urine calcium test if you have symptoms such as weakness, confusion, or fatigue. It can also be done if you have a history of kidney stones or if you have a family history of calcium-related disorders. It may also be done to monitor calcium levels in people who are taking calcium supplements or medications, or if you are being treated for certain conditions.