Vitamin B12: pg/mL to pmol/L
Convert Vitamin B12 between pg/mL and pmol/L — Vitamin B12 (cobalamin) is reported in pg/mL in the US and pmol/L elsewhere. Type in either box to convert both ways.
Vitamin B12 conversion table (pg/mL to pmol/L)
| Vitamin B12 (pg/mL) | Vitamin B12 (pmol/L) |
|---|---|
| 150 pg/mL | 110.671 pmol/L |
| 200 pg/mL | 147.561 pmol/L |
| 300 pg/mL | 221.342 pmol/L |
| 400 pg/mL | 295.122 pmol/L |
| 550 pg/mL | 405.793 pmol/L |
| 700 pg/mL | 516.464 pmol/L |
| 900 pg/mL | 664.025 pmol/L |
How to convert Vitamin B12 from pg/mL to pmol/L
To convert Vitamin B12, multiply pg/mL by 0.738 — cobalamin has a molar mass of 1355.37 g/mol. For example, 1 pg/mL equals 0.737806 pmol/L. The converter above runs the exact factor at full precision and updates as you type; the swap button flips the direction.
Frequently asked questions
How do you convert Vitamin B12 from pg/mL to pmol/L?
Multiply pg/mL by 0.738 — cobalamin has a molar mass of 1355.37 g/mol. For example, 1 pg/mL is 0.737806 pmol/L. The converter above does this instantly and works both ways — type a value in either box. It uses the exact factor at full precision, so the result matches published clinical conversions.
What is a normal Vitamin B12 level?
Typical serum B12 is about 200–900 pg/mL (148–664 pmol/L); values under ~200 pg/mL (148 pmol/L) may indicate deficiency. These are general adult figures only — the reference interval on your own lab report is what applies to you, and it can differ by lab, method, age and sex. The conversion table above runs from 150 to 900 pg/mL, or 110.671 to 664.025 pmol/L, so a range quoted in either system can be lined up against your own figure.
Why is Vitamin B12 reported in different units?
Vitamin B12 (cobalamin) is reported in pg/mL in the US and pmol/L elsewhere. The two systems describe the same measurement, so a value converts exactly from one to the other with no loss of meaning — only the units and the number change. That is why guidelines, journals and lab reports from different countries quote different numbers for the same Vitamin B12 result. The two boxes above are labelled pg/mL and pmol/L, so you can read a value in whichever system your own report uses.
Is this Vitamin B12 converter accurate and free?
Yes — this Vitamin B12 converter is both accurate and free. It applies the standard, published conversion factor at full double precision in your browser, with nothing uploaded or stored, and there is no sign-up or usage limit. It converts units only and does not interpret or diagnose results.
This is a unit-conversion reference tool, not a diagnosis or medical advice. Reference intervals are general adult guides that vary by laboratory, method and individual — always read your result against the range printed on your own report and discuss it with a qualified healthcare professional.
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