How do I convert Calcium (spot urine) from mg/dL to mmol/L?

mmol/L = mg/dL × 0.2495. In the other direction: mg/dL = mmol/L × 4.008.

Which units are used for Calcium (spot urine)?

Common units are mmol/L, mg/dL.

Urine & CSF

Calcium in spot urine (calcium/creatinine ratio)

Also known as: Calcium (Spontanurin)

Enter a value in any unit and all other units fill in.

mmol/L mg/dL

1 mmol/L = 4.01 mg/dL

mmol/L	mmol/L = mg/dL × 0.2495	mg/dL = mmol/L × 4.008

Calcium (spot urine) is reported in mg/dL or mmol/L. The page converts between the units only.

mmol/L × 4.008 = mg/dL (exact factor 4.008).
No established reference range is listed here; compare your result only with the range printed on your own report.

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Source: PubChem: periodic table element data · Last reviewed: 2026-10-19

Note from the source: No established reference range; the page converts units only. Mass-to-amount conversion uses a molar mass of 40.08 g/mol.