Micrograms to international units
Type a value in µg to get it in IU instantly.
That's 4× as much as a high-dose supplement — nothing on our list beats it. Information only: check the form stated on your own label.
Convert the other way: IU to µg
What it means
How much is that?
Information only, not medical advice. Labels increasingly give micrograms instead of IU, and for vitamin E the natural and synthetic forms differ.
The math
How to convert µg to IU
An IU is a unit of activity, so each vitamin has its own weight: µg = IU × µg per IU. The figures below use the vitamin selected above.
Example: 1,000 µg = 40,000 IU.
The table below is for Vitamin D (1 IU = 0.025 µg).
Every unit
Your dose in every unit
Tables
µg to IU conversion table
| µg | IU |
|---|---|
| 100 µg | 4,000 IU |
| 200 µg | 8,000 IU |
| 400 µg | 16,000 IU |
| 500 µg | 20,000 IU |
| 800 µg | 32,000 IU |
| 1,000 µg | 40,000 IU |
| 2,000 µg | 80,000 IU |
| 4,000 µg | 160,000 IU |
| 5,000 µg | 200,000 IU |
| 10,000 µg | 400,000 IU |
IU to µg conversion table
| IU | µg |
|---|---|
| 100 IU | 2.5 µg |
| 200 IU | 5 µg |
| 400 IU | 10 µg |
| 500 IU | 12.5 µg |
| 800 IU | 20 µg |
| 1,000 IU | 25 µg |
| 2,000 IU | 50 µg |
| 4,000 IU | 100 µg |
| 5,000 IU | 125 µg |
| 10,000 IU | 250 µg |
Quick answers
Quick answers
- How many IU is 1 µg?
- 1 µg is 40 IU.
- How many IU is 10 µg?
- 10 µg is 400 IU.
- How many IU is 1,000 µg?
- 1,000 µg is 40,000 IU.
The units
About these units
Micrograms (µg)
What modern labels give, often written mcg.
International units (IU)
A measure of biological activity. Its weight depends on the vitamin.
Keep going