Soraya, letter from the clinic
Vitamin D 50
20 ng/mL
Vitamin D Unit Converter
The Vitamin D Unit Converter switches a reading between common units. nmol/L divided by 2.5 gives ng/mL. Units only. It does not say whether the number is healthy. Take the original printout to your GP if you need it interpreted.
Your details
Enter the figures you actually have, in the units on the form.
What is this calculator?
The Vitamin D Unit Converter switches a reading between common units. nmol/L divided by 2.5 gives ng/mL. Units only. It does not say whether the number is healthy. Take the original printout to your GP if you need it interpreted.
How it works
- Type the figure in the unit on your letter or device.
- We convert with a published factor.
- Use the pair of units when you talk to a clinician. We do not diagnose.
Common questions
What is the vitamin d unit converter?
Unit maths only. Same quantity, different label.
Which unit does the NHS use?
UK lab letters often use SI units. Keep the original unit on the printout as well as the conversion.
Can I treat the converted number as a target?
No. Conversion does not change meaning. Ask the clinician who ordered the test.
Example scenarios
Bridie, units on the printout
Vitamin D 61
24.4 ng/mL
Priti, before the GP call
Vitamin D 39
15.6 ng/mL
Understanding your results
If the two units disagree with the letter, trust the letter. Rounding to one decimal is enough for home use.
About this result
Guidance only. Calculations run in your browser. Numbers are estimates, not a diagnosis.
How we calculate
nmol/L divided by 2.5 gives ng/mL. Units only.
Sources
Limitations
- Units only.
- Not a diagnosis.
- Keep the original printout.
When to seek help
Speak to a GP or call NHS 111 if you are worried. Call 999 in an emergency.
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