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Convert International Units (IU) to mcg or mg for Vitamin A, D, and E — the three vitamins still commonly labeled in IU — using current FDA/USP conversion factors. Also includes a general mcg/mg/g converter.
As retinol (RAE). Beta-carotene sources convert at a different, variable ratio.
1 mcg = 40 IU.
Synthetic (dl-alpha-tocopherol) converts at 1 IU = 0.45 mg instead.
1,000 mcg = 1 mg · 1,000 mg = 1 g. Type into any field.
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