Vitamin D Dosage Calculator

Dr. Arham Shabbir

Medically reviewed by Dr. Arham Shabbir, PhD (Pharmacology), M.Phil (Pharmacology), B.Pharm (RPh)

Written by Dr. Muhammad Imran, M.Phil, PharmD, BSc

Updated on

Part of our Vitamin D Treatment Hub. Learn about symptoms and B12 deficiency.

Vitamin D Dosage Calculator

Vitamin D Deficiency Calculator

Estimate a common correction plan, convert vitamin D units, and share the result. Educational only; confirm dosing with a clinician.

Conversion factor: 1 ng/mL = 2.5 nmol/L. Common adult correction regimens include 50,000 IU weekly for 8 weeks or 6,000 IU daily for 8 weeks, followed by maintenance dosing; some patients need higher doses [web:46][web:49][web:56][web:62].

References

  1. NIH Office of Dietary Supplements. Vitamin D Fact Sheet for Health Professionals.
  2. Endocrine Society. Vitamin D for the Prevention of Disease Guideline Resources.
  3. Medscape guideline summary. Vitamin D for Disease Prevention: ES 2024 Guideline Summary.
  4. AZ Calculator. ng/mL to nmol/L Vitamin D Conversion.
  5. ScyMed MediCalc. 25-(OH) Vitamin D Unit Conversion.