Blood Test Helper
25(OH)D Conversion Calculator
Convert vitamin D blood test results between ng/mL and nmol/L. The conversion is simple: multiply ng/mL by 2.5, or divide nmol/L by 2.5.
This calculator only converts units. It does not interpret whether your result is right for you. Use your own lab's reference range and discuss high-dose vitamin D3 use with your clinician.