How do you convert vitamin D from nmol/L to ng/mL?

Divide the nmol/L figure by 2.496. For example, 62 nmol/L is about 24.8 ng/mL. To go the other way, multiply ng/mL by 2.496.

Which unit does the UK use for vitamin D?

UK and most European labs report 25-OH vitamin D in nmol/L. The United States and some private tests use ng/mL, which is why results can look very different for the same person.

Does this tell me if my vitamin D is low?

No. This converter only changes the unit; it is not a diagnosis. Whether a level is sufficient depends on the reference range on your report and your own circumstances, which are for a clinician to interpret.

Helvy tool · Free

Vitamin D Unit Converter

UK labs report vitamin D in nmol/L; US sources use ng/mL. Convert between them instantly, no account needed.

Value in nmol/L

1 ng/mL = 2.496 nmol/L, so 1 nmol/L = 0.4006 ng/mL.

How this is worked out

Uses the standard conversion factor for 25-hydroxyvitamin D: 1 ng/mL = 2.496 nmol/L (molar mass 400.6 g/mol), so 1 nmol/L = 0.4006 ng/mL.

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 D from nmol/L to ng/mL?: Divide the nmol/L figure by 2.496. For example, 62 nmol/L is about 24.8 ng/mL. To go the other way, multiply ng/mL by 2.496.
Which unit does the UK use for vitamin D?: UK and most European labs report 25-OH vitamin D in nmol/L. The United States and some private tests use ng/mL, which is why results can look very different for the same person.
Does this tell me if my vitamin D is low?: No. This converter only changes the unit; it is not a diagnosis. Whether a level is sufficient depends on the reference range on your report and your own circumstances, which are for a clinician to interpret.

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Vitamin D Unit Converter

The panel that covers this

General Energy & Wellness

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Vitamin D Unit Converter

The panel that covers this

General Energy & Wellness

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