Convert vitamin D levels between ng/mL and nmol/L instantly.
This tool helps you convert vitamin D levels between ng/mL and nmol/L. These units are used in different countries and lab reports.
Medical Disclaimer: This tool provides general educational estimates. Always consult your prescribing physician or healthcare provider before making medication changes or interpreting results from population-based models.
Different countries use different measurement systems for vitamin D:
Converting between these units helps you compare your results with international guidelines and research.
The conversion factor is 2.5. To convert:
Most US labs report vitamin D in ng/mL, while laboratories in Europe, Canada, and Australia typically use nmol/L. The unit should be listed on your lab report.
Generally, vitamin D levels are categorized as:
These ranges may vary depending on the laboratory and medical guidelines. Always consult with your healthcare provider about your specific results.
The use of different units stems from historical preferences in measurement systems. The US has traditionally favored weight-based measurements (ng/mL), while many other countries have adopted the International System of Units (SI), which uses substance concentration (nmol/L).
Vitamin D testing typically measures the level of 25-hydroxyvitamin D [25(OH)D] in your blood, which is the primary circulating form of vitamin D and the best indicator of your vitamin D status. The test requires a simple blood sample and can be ordered by your healthcare provider.