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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

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.