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# How to Convert Vitamin A Palmitate IU to Micrograms

by
Leigh Wittman
Leigh Wittman has been writing professionally since 2007. She writes primarily on health, career advice, outdoor pursuits and travel for various websites. Wittman is a licensed nurse and studied nursing at Arizona State University.
Calculator on a counter Photo Credit Stockbyte/Stockbyte/Getty Images

Vitamin A is available in a variety of forms, including retinol, retinyl acetate and retinyl palmitate. Vitamin A is measured in both international units — commonly abbreviated IU — and micrograms. Vitamin A is a fat-soluble vitamin, making overdose more likely than with water-soluble vitamins. Therefore, knowing how to convert a measurement of retinyl palmitate from IU to micrograms can be beneficial when determining the dosage of a vitamin supplement.

## Step 1

Locate the amount of vitamin A palmitate on the nutrition facts table.

## Step 2

Multiply the amount of vitamin A palmitate in IU by 0.55 to determine the amount in micrograms. For example, 100 IU of vitamin A palmitate is equivalent to 55 mcg.

## Step 3

Check your work by dividing the amount of vitamin A palmitate micrograms by its equivalent amount in IU. The quotient will be 0.55 if you correctly converted IU to micrograms. For example, if you determined that 200 IU of vitamin A palmitate is equivalent to 110 mcg, you would check your work by dividing 110 mcg by 200 IU. The quotient is 0.55, which means that 110 mcg of vitamin A palmitate is, in fact, equivalent to 200 IU of vitamin A palmitate.

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