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.