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mcg to IU Converter — Free Online Tool
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mcg to IU Converter

Convert micrograms (mcg) to International Units (IU) for vitamins

Pharmacology Guidelines: Conversion from micrograms (mcg) to International Units (IU) depends on the specific substance. For example, 1 mcg of Vitamin D = 40 IU, while 1 mcg of Vitamin A = 3.33 IU. Select your substance and enter value below.
Conversion Parameters Input

Conversion Results

⚠️ Not medical advice. For nutritional science, dietary supplement, and clinical reference only. Supplement dosage conversion and nutritional planning must be verified and supervised by a qualified physician or dietitian.

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