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Medication | Vitamin D

Vitamin D Calculator

Converting international units and micrograms for vitamin D3. Vitamin D3, often just called vitamin D, chemical name cholecalciferol, is a fat-soluble vitamin. It is found only in small amounts in the diet and is formed by people exposing their skin to direct sunlight. Because many people don't get enough sun, it's often used as a dietary supplement. Whether and for whom this can be useful is not the subject of this page, on this get medical advice.

Vitamin D3 is measured either in international units (IU) or in micrograms (μg), with one international unit equaling 0.025 micrograms. One μg (millionth of a gram) is 40 IU. These values can be converted into one another here. Please fill in one value to calculate the other.

International units:
Micrograms:


Example: 800 international units of vitamin D3 correspond to 20 micrograms.

For other vitamins see international units vitamins

This is no medical advice.

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