24-h urine calcium unit converter
Convert 24-h urine calcium between mg/24 h and mmol/24 h. Type in either box. The factors come from our catalog and are checked by code.
AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03
1 mg/24 h = 0.025 mmol/24 h. Nothing you type here leaves your browser.
The conversion
- 1 mg/24 h = 0.02495 mmol/24 hFrom mg/24 h to mmol/24 h: divide by 40.08. Back again: multiply by 40.08.
Mass and molar units are linked by the molecular weight: 40.08 g/mol (calcium (Ca), atomic weight). Source: PubChem, U.S. National Library of Medicine.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| mg/24 h | mmol/24 h |
|---|---|
| 100 | 2.5 |
| 200 | 4.99 |
| 250 | 6.24 |
| 300 | 7.49 |
| 400 | 9.98 |
| 500 | 12.48 |
| 600 | 14.97 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the 24-h urine calcium page.
| Who | mg/24 h | mmol/24 h |
|---|---|---|
| Men, 18+ | up to 250 | up to 6.24 |
| Women, 18+ | up to 200 | up to 4.99 |