Vitamin D (25-OH): units, conversion and tracking
Updated
Short answer
Vitamin D (25-OH) is reported in ng/mL and nmol/L. 1 nmol/L = 0.4006 ng/mL.
Convert vitamin D (25-OH)
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 D (25-OH)?
The main circulating form of vitamin D, made in the skin and absorbed from food.
BiomarkerHQ groups vitamin D (25-OH) under Vitamins and minerals. On lab reports it can also appear as vitamin d, vitamin d 25 hydroxy, 25-hydroxyvitamin d, 25-hydroxy vitamin d, 25-oh vitamin d and 25-oh vitamin d3.
Vitamin D (25-OH) units and conversion
BiomarkerHQ stores each vitamin D (25-OH) result in the unit printed on the report, and charts and compares results in ng/mL.
1 nmol/L = 0.4006 ng/mL
1 ng/mL = 2.496 nmol/L
| nmol/L | ng/mL |
|---|---|
| 25 nmol/L | 10.02 ng/mL |
| 50 nmol/L | 20.03 ng/mL |
| 75 nmol/L | 30.05 ng/mL |
| 100 nmol/L | 40.06 ng/mL |
| 125 nmol/L | 50.08 ng/mL |
| 150 nmol/L | 60.1 ng/mL |
| 200 nmol/L | 80.13 ng/mL |
| ng/mL | nmol/L |
|---|---|
| 10 ng/mL | 24.96 nmol/L |
| 20 ng/mL | 49.92 nmol/L |
| 30 ng/mL | 74.88 nmol/L |
| 40 ng/mL | 99.84 nmol/L |
| 50 ng/mL | 124.8 nmol/L |
| 60 ng/mL | 149.8 nmol/L |
| 80 ng/mL | 199.7 nmol/L |
For another value, use the lab unit converter. It converts units only and does not interpret a result.
Tracking vitamin D (25-OH) over time
In BiomarkerHQ, each vitamin D (25-OH) 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 D (25-OH) in?
Vitamin D (25-OH) is reported in ng/mL and nmol/L. BiomarkerHQ stores each result in the unit printed on the report and uses ng/mL for charts and comparisons.
How do I convert vitamin D (25-OH) from nmol/L to ng/mL?
1 nmol/L = 0.4006 ng/mL. For example, 100 nmol/L is 40.06 ng/mL.
How do I convert vitamin D (25-OH) from ng/mL to nmol/L?
1 ng/mL = 2.496 nmol/L. For example, 40 ng/mL is 99.84 nmol/L.
Does BiomarkerHQ interpret my vitamin D (25-OH) 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.
Related
Keep your results in one place
The dashboard works without an account and keeps your data in your browser unless you sign in.