Vitamin D Level Converter and Comparison
Convert and compare vitamin D lab values without calculating a dose
This tool converts and compares laboratory values only. It does not calculate a personalized vitamin D dose. Ask a qualified clinician to interpret your results and make dosing decisions.
Table of Contents
How to Use
- Enter your current vitamin D level (from blood test)
- Enter your target vitamin D level
- Select your measurement unit (ng/mL or nmol/L)
- Convert and Compare Levels
Unit conversion
Vitamin D results can be expressed in ng/mL or nmol/L. The conversion used here is 1 ng/mL = 2.5 nmol/L.
Dosing decisions
Supplement dosing cannot be determined safely from two lab values alone. A qualified clinician should consider the laboratory method, medical history, medicines, diet, and follow-up plan.
Frequently Asked Questions
- Does this calculator tell me how much vitamin D3 to take?
- No. It only converts and compares entered lab values. A qualified clinician should make any dosing decision.