Vitamin B12: units, conversion and tracking
Updated
Short answer
Vitamin B12 is reported in pg/mL and pmol/L. 1 pmol/L = 1.355 pg/mL.
Convert vitamin B12
Enter a value to see the converted result.
Converts units only and does not interpret a result. For other markers, use the full unit converter.
What is vitamin B12?
A B vitamin needed for blood cell formation and nerve function.
BiomarkerHQ groups vitamin B12 under Vitamins and minerals. On lab reports it can also appear as vitamin b 12, b12, b 12, cobalamin, cyanocobalamin and b12 total.
Vitamin B12 units and conversion
BiomarkerHQ stores each vitamin B12 result in the unit printed on the report, and charts and compares results in pg/mL.
1 pmol/L = 1.355 pg/mL
1 pg/mL = 0.7378 pmol/L
| pmol/L | pg/mL |
|---|---|
| 100 pmol/L | 135.5 pg/mL |
| 150 pmol/L | 203.3 pg/mL |
| 200 pmol/L | 271.1 pg/mL |
| 300 pmol/L | 406.6 pg/mL |
| 400 pmol/L | 542.1 pg/mL |
| 500 pmol/L | 677.7 pg/mL |
| 600 pmol/L | 813.2 pg/mL |
| pg/mL | pmol/L |
|---|---|
| 150 pg/mL | 110.7 pmol/L |
| 200 pg/mL | 147.6 pmol/L |
| 300 pg/mL | 221.3 pmol/L |
| 400 pg/mL | 295.1 pmol/L |
| 500 pg/mL | 368.9 pmol/L |
| 600 pg/mL | 442.7 pmol/L |
| 800 pg/mL | 590.2 pmol/L |
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Tracking vitamin B12 over time
In BiomarkerHQ, each vitamin B12 result is saved with its collection date, its unit and the reference range printed on that report. The timeline charts the results across your draws against the range from each of your own reports, and any two draws can be compared side by side.
- Keep the unit printed on each report. Convert only to compare.
- Keep each report's own range with its result. See why ranges differ between labs.
- Compare the same lab and conditions where you can. See how to compare two blood tests.
Frequently asked questions
Which units do labs report vitamin B12 in?
Vitamin B12 is reported in pg/mL and pmol/L. BiomarkerHQ stores each result in the unit printed on the report and uses pg/mL for charts and comparisons.
How do I convert vitamin B12 from pmol/L to pg/mL?
1 pmol/L = 1.355 pg/mL. For example, 300 pmol/L is 406.6 pg/mL.
How do I convert vitamin B12 from pg/mL to pmol/L?
1 pg/mL = 0.7378 pmol/L. For example, 400 pg/mL is 295.1 pmol/L.
Does BiomarkerHQ interpret my vitamin B12 result?
No. It compares a result only with the reference range printed on your own lab report, as below, within or above, and does not say what the result means. Talk to a qualified clinician about your results.
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