Calcium (Urine)
The urine calcium test measures the amount of calcium excreted in urine over 24 hours. It helps evaluate parathyroid function, kidney stones, and bone disorders.
Category: Urinalysis
Also known as: urine calcium, calcium urine, urinary calcium, 24h urine calcium, 24-hour urine calcium
Reference range: 100–300 mg/24hr (Source: ABIM)
Standard unit: mg/24hr
High values may indicate
High urine calcium (hypercalciuria) may indicate hyperparathyroidism, kidney stones, sarcoidosis, excessive vitamin D intake, or certain cancers.
Low values may indicate
Low urine calcium may indicate vitamin D deficiency, hypoparathyroidism, malabsorption disorders, or kidney disease.
Frequently asked questions
- What is a normal Calcium (Urine) level?
- A typical reference range for Calcium (Urine) is 100–300 mg/24hr (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Calcium (Urine) measured in?
- Calcium (Urine) is most commonly reported in mg/24hr. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Calcium (Urine) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Calcium (Urine) over time?
- Yes. Upload results from any lab and BloodId charts your Calcium (Urine) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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