Calcium, Urine Test
Calcium, Urine Test can be requested without a referral, and this overview covers what to expect. A calcium, urine test measures the amount of calcium in your urine over a set period, often 24 hours. It helps evaluate conditions affecting calcium balance, such as kidney stones, parathyroid problems, or bone disorders.
- Sample type
- urine
- Category
- Vitamin & Mineral
- Turnaround
- 1-3 business days
- Price
- $29
- Referral
- Not required
A calcium, urine test measures the amount of calcium in your urine over a set period, often 24 hours. It helps evaluate conditions affecting calcium balance, such as kidney stones, parathyroid problems, or bone disorders.
What it measures
- Urine calcium — Total calcium excreted in the urine over the collection period.
- Urine volume — Total amount of urine collected, needed to calculate calcium concentration.
- Creatinine (urine) — A waste product used to check how completely the collection was done.
- Calcium-to-creatinine ratio — A calculated value that adjusts calcium for urine concentration.
Who it is for
A clinician may order this test if you have had kidney stones, symptoms of high or low calcium, or a known parathyroid or bone condition.
Preparation
Your clinician may ask you to follow a specific diet or avoid certain supplements before the test. Often, no special preparation is needed beyond collecting all urine for the full time period.
Results and what they mean
Results are reported as the amount of calcium in the urine, sometimes with a ratio. Your clinician interprets these numbers along with your medical history and other tests. This is general information, not medical advice; discuss your results with a qualified healthcare professional.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the calcium, urine test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Do I need to fast for this test?
Fasting is usually not required, but your clinician may give specific instructions about food or supplements.
How do I collect a 24-hour urine sample?
You will collect all urine over a full day and night into a special container. Follow the instructions from your lab carefully to avoid errors.
What can affect my urine calcium level?
Diet, certain medications, vitamin D, and how much water you drink can all affect the result.
Is this test painful?
No. It only involves collecting urine, which is painless.