Iron unit converter
Convert iron between µg/dL and µmol/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 µg/dL = 0.1791 µmol/L. Nothing you type here leaves your browser.
The conversion
- 1 µg/dL = 0.1791 µmol/LFrom µg/dL to µmol/L: divide by 5.585. Back again: multiply by 5.585.
Mass and molar units are linked by the molecular weight: 55.84 g/mol (Iron (Fe), atomic weight 55.84 g/mol per PubChem. 1 µmol/L of iron = 55.84 µg/L = 5.584 µg/dL (labs use 5.585).). Source: PubChem (NIH).
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| µg/dL | µmol/L |
|---|---|
| 27 | 4.8 |
| 38 | 6.8 |
| 50 | 9 |
| 100 | 17.9 |
| 139 | 24.9 |
| 150 | 26.9 |
| 159 | 28.5 |
| 169 | 30.3 |
| 200 | 35.8 |
| 250 | 44.8 |
| 300 | 53.7 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Iron page.
| Who | µg/dL | µmol/L |
|---|---|---|
| Men, 18+ | 38–169 | 6.8–30.3 |
| Women, 18–59 | 27–159 | 4.8–28.5 |
| Women, 60+ | 27–139 | 4.8–24.9 |
| 13–17 | 26–169 | 4.7–30.3 |
| 2–12 | 28–147 | 5–26.3 |
| 0.085–1 | 18–126 | 3.2–22.6 |
| Men, under 0.085 | 35–160 | 6.3–28.6 |
| Women, under 0.085 | 27–133 | 4.8–23.8 |