Magnesium unit converter
Convert magnesium between mg/dL, mmol/L and mEq/L. 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/dL = 0.4114 mmol/L. Nothing you type here leaves your browser.
The conversion
- 1 mg/dL = 0.4114 mmol/LFrom mg/dL to mmol/L: divide by 2.43. Back again: multiply by 2.43.
- 1 mg/dL = 0.8229 mEq/LFrom mg/dL to mEq/L: divide by 1.215. Back again: multiply by 1.215.
Mass and molar units are linked by the molecular weight: 24.305 g/mol (elemental magnesium (Mg), standard atomic weight). Source: National Library of Medicine, PubChem.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| mg/dL | mmol/L | mEq/L |
|---|---|---|
| 0.5 | 0.21 | 0.4 |
| 1 | 0.41 | 0.8 |
| 1.5 | 0.62 | 1.2 |
| 1.7 | 0.7 | 1.4 |
| 2 | 0.82 | 1.6 |
| 2.1 | 0.86 | 1.7 |
| 2.3 | 0.95 | 1.9 |
| 2.5 | 1.03 | 2.1 |
| 3 | 1.23 | 2.5 |
| 3.5 | 1.44 | 2.9 |
| 4 | 1.65 | 3.3 |
| 4.5 | 1.85 | 3.7 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Magnesium page.
| Who | mg/dL | mmol/L | mEq/L |
|---|---|---|---|
| 18+ | 1.7–2.3 | 0.7–0.95 | 1.4–1.9 |
| 12–17 | 1.6–2.3 | 0.66–0.95 | 1.3–1.9 |
| 9–11 | 1.6–2.4 | 0.66–0.99 | 1.3–2 |
| 6–8 | 1.6–2.5 | 0.66–1.03 | 1.3–2.1 |
| 3–5 | 1.6–2.6 | 0.66–1.07 | 1.3–2.1 |
| under 3 | 1.6–2.7 | 0.66–1.11 | 1.3–2.2 |