Vitamin B12 unit converter
Convert vitamin B12 between pg/mL and pmol/L. Type in either box. The factors come from our catalog and are checked by code.
AI-drafted. Awaiting verificationLast reviewed 2026-10-03
1 pg/mL = 0.7378 pmol/L. Nothing you type here leaves your browser.
The conversion
- 1 pg/mL = 0.7378 pmol/LFrom pg/mL to pmol/L: divide by 1.355. Back again: multiply by 1.355.
Mass and molar units are linked by the molecular weight: 1,355.4 g/mol (cyanocobalamin (vitamin B12), C63H88CoN14O14P). Source: PubChem (National Library of Medicine).
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| pg/mL | pmol/L |
|---|---|
| 102 | 75 |
| 201 | 148 |
| 203 | 150 |
| 232 | 171 |
| 250 | 184 |
| 300 | 221 |
| 339 | 250 |
| 500 | 369 |
| 750 | 553 |
| 1,000 | 738 |
| 1,245 | 919 |
| 1,250 | 922 |
| 1,500 | 1,107 |
| 1,750 | 1,291 |
| 2,000 | 1,476 |
| 2,250 | 1,660 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Vitamin B12 page.
| Who | pg/mL | pmol/L |
|---|---|---|
| Adults | 232–1,245 | 171–919 |