Vitamin D Calculator
Convert vitamin D between micrograms (ug/mcg) and International Units (IU), then review dose category and common daily equivalents.
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Use this converter to compare labels, but use blood test results and clinician guidance for medical dosing decisions.
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Test a different daily vitamin D amount without changing your main result.
Calculate your baseline first
For vitamin D, 1 microgram (ug or mcg) equals 40 IU. Multiply ug by 40 to get IU, or divide IU by 40 to get ug.
Yes. On supplement labels, ug and mcg both mean micrograms. Some labels list both micrograms and IU for vitamin D.
No. It converts units and gives general dose context only. Personal vitamin D needs depend on blood levels, diet, sun exposure, age, pregnancy status, medications and medical history.
Results are estimates and unit conversions generated locally in your browser. This tool is for informational purposes only, not medical advice, diagnosis or treatment. Vitamin D dosing can be unsafe when excessive or inappropriate for your health status. Consult a qualified healthcare professional for personalised guidance, especially if pregnant, breastfeeding, taking medication, managing kidney disease, sarcoidosis, hypercalcemia or other medical conditions.
