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Urine & CSF

Calcium (24-h urine): convert mg/24 h to mmol/24 h

mmol/24 h = mg/24 h × 0.02495

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

Conversion formulas

mg/24 h → mmol/24 hmmol/24 h = mg/24 h × 0.02495
mmol/24 h → mg/24 hmg/24 h = mmol/24 h × 40.08

Conversion table

Highlighted: values inside the adult reference range.

mg/24 hmmol/24 h
501.248
1002.495
1503.743
2004.99
2506.237
3007.485
3508.732
4009.98
45011.23
50012.47
55013.72
60014.97
65016.22
70017.46
75018.71

Reference range

100.2 – 300.6 mg/24 h = 2.5 – 7.5 mmol/24 h

Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14

Frequently asked questions

How do I convert Calcium (24-h urine) from mg/24 h to mmol/24 h?

mmol/24 h = mg/24 h × 0.02495. For example, 200 mg/24 h equals 4.99 mmol/24 h.

How many mmol/24 h are 200 mg/24 h?

200 mg/24 h equal 4.99 mmol/24 h (Calcium (24-h urine)).

How do I convert Calcium (24-h urine) from mmol/24 h back to mg/24 h?

mg/24 h = mmol/24 h × 40.08.

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