Hemoglobin unit converter
Convert hemoglobin between g/dL, g/L and mmol/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 g/dL = 10 g/L. Nothing you type here leaves your browser.
The conversion
- 1 g/dL = 10 g/LFrom g/dL to g/L: multiply by 10. Back again: divide by 10.
- 1 g/dL = 0.6206 mmol/LFrom g/dL to mmol/L: divide by 1.611. Back again: multiply by 1.611.
Mass and molar units are linked by the molecular weight: 16,114.5 g/mol (Hemoglobin monomer (one heme/iron unit, Hb(Fe)): one quarter of the tetramer's 64,458 g/mol. This is the basis behind the 0.6206 mmol/L per g/dL factor used by labs that report mmol/L.). Source: Wikipedia.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| g/dL | g/L | mmol/L |
|---|---|---|
| 5 | 50 | 3.1 |
| 8 | 80 | 5 |
| 10 | 100 | 6.2 |
| 11 | 110 | 6.8 |
| 11.1 | 111 | 6.9 |
| 12 | 120 | 7.4 |
| 13 | 130 | 8.1 |
| 15 | 150 | 9.3 |
| 15.9 | 159 | 9.9 |
| 17.7 | 177 | 11 |
| 20 | 200 | 12.4 |
| 25 | 250 | 15.5 |
| 30 | 300 | 18.6 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Hemoglobin page.
| Who | g/dL | g/L | mmol/L |
|---|---|---|---|
| Men, 16+ | 13–17.7 | 130–177 | 8.1–11 |
| Women, 16+ | 11.1–15.9 | 111–159 | 6.9–9.9 |
| Men, 13–15 | 12.6–17.7 | 126–177 | 7.8–11 |
| Women, 13–15 | 11.1–15.9 | 111–159 | 6.9–9.9 |
| 8–12 | 11.7–15.7 | 117–157 | 7.3–9.7 |
| 1–7 | 10.9–14.8 | 109–148 | 6.8–9.2 |
| 0.249–0 | 10.4–14.1 | 104–141 | 6.5–8.8 |
| 0.085–-0.751 | 8.8–14.3 | 88–143 | 5.5–8.9 |
| 0.022–-0.915 | 10.5–18.7 | 105–187 | 6.5–11.6 |
| under 0.022 | 10.7–20.5 | 107–205 | 6.6–12.7 |