Calcium (Urine)
Clinical Biochemistry
Sample and container requirements
Plain Spot Urine Plain 24 hr Urine
Minimum volume required
Special requirements
Acidify urine in the laboratory (24hr urine acidified by adding 400 uL of 3M HCL)
Patient preparation
None
Sample viability
Turnaround time
7 days
Reference range
2.50 – 7.50 mmol/24 hr (Source: Pathology Harmony Recommendations)
Clinical guidance
Please refer to LabTestsOnlineUK to learn more about urine calcium. https://labtestsonline.org.uk/tests/calcium-test
Notes
Images to go here
This information was last updated on 19 August 2026