How do you convert vitamin B12 from ng/L to pmol/L?

Multiply the ng/L figure by 0.7378. For example, 400 ng/L is about 295 pmol/L. To go the other way, divide pmol/L by 0.7378.

Is ng/L the same as pg/mL for B12?

Yes. ng/L and pg/mL are numerically identical, so a B12 of 400 ng/L is the same as 400 pg/mL. Only the pmol/L unit uses a different scale.

Does this tell me if my B12 is low?

No. This converter only changes the unit; it is not a diagnosis. Whether a B12 level is adequate depends on the reference range on your report, your symptoms and sometimes further tests, which are for a clinician to interpret.

Helvy tool · Free

Vitamin B12 Unit Converter

UK labs usually report vitamin B12 in ng/L (the same number as pg/mL); some labs and active-B12 tests use pmol/L. Convert between them instantly, no account needed.

Value in ng/L

1 ng/L (pg/mL) = 0.7378 pmol/L, so 1 pmol/L = 1.3554 ng/L.

How this is worked out

Uses the standard conversion factor for vitamin B12 (cobalamin): 1 ng/L = 0.7378 pmol/L (molar mass 1355.37 g/mol), so 1 pmol/L = 1.3554 ng/L. ng/L and pg/mL are numerically identical.

This tool is for general wellbeing information and is not a diagnosis or medical advice. It places the numbers you enter in context; it cannot tell you whether you have a condition. If a result concerns you, or you have symptoms, speak to your GP.

Questions

How do you convert vitamin B12 from ng/L to pmol/L?: Multiply the ng/L figure by 0.7378. For example, 400 ng/L is about 295 pmol/L. To go the other way, divide pmol/L by 0.7378.
Is ng/L the same as pg/mL for B12?: Yes. ng/L and pg/mL are numerically identical, so a B12 of 400 ng/L is the same as 400 pg/mL. Only the pmol/L unit uses a different scale.
Does this tell me if my B12 is low?: No. This converter only changes the unit; it is not a diagnosis. Whether a B12 level is adequate depends on the reference range on your report, your symptoms and sometimes further tests, which are for a clinician to interpret.

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Vitamin B12 Unit Converter

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Vitamin B12 Unit Converter

The panel that covers this

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Vitamins & Minerals

A clearer picture of your health starts with a single drop.