Thousand international units to milligrams
Type a value in 1,000 IU to get it in mg instantly.
25mg
That's 100× as much as a high-dose supplement — nothing on our list beats it. Information only: check the form stated on your own label.
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 1,000 IU to mg
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 1,000 IU = 25 mg.
The table below is for Vitamin D (1 IU = 0.025 µg).
Every unit
Your dose in every unit
Tables
1,000 IU to mg conversion table
| 1,000 IU | mg |
|---|---|
| 100 1,000 IU | 2.5 mg |
| 200 1,000 IU | 5 mg |
| 400 1,000 IU | 10 mg |
| 500 1,000 IU | 12.5 mg |
| 800 1,000 IU | 20 mg |
| 1,000 1,000 IU | 25 mg |
| 2,000 1,000 IU | 50 mg |
| 4,000 1,000 IU | 100 mg |
| 5,000 1,000 IU | 125 mg |
| 10,000 1,000 IU | 250 mg |
mg to 1,000 IU conversion table
| mg | 1,000 IU |
|---|---|
| 100 mg | 4,000 1,000 IU |
| 200 mg | 8,000 1,000 IU |
| 400 mg | 16,000 1,000 IU |
| 500 mg | 20,000 1,000 IU |
| 800 mg | 32,000 1,000 IU |
| 1,000 mg | 40,000 1,000 IU |
| 2,000 mg | 80,000 1,000 IU |
| 4,000 mg | 160,000 1,000 IU |
| 5,000 mg | 200,000 1,000 IU |
| 10,000 mg | 400,000 1,000 IU |
Quick answers
Quick answers
- How many mg is 1 1,000 IU?
- 1 1,000 IU is 0.025 mg.
- How many mg is 10 1,000 IU?
- 10 1,000 IU is 0.25 mg.
- How many mg is 1,000 1,000 IU?
- 1,000 1,000 IU is 25 mg.
The units
About these units
Thousand international units (1,000 IU)
How vitamin D supplements are usually labeled.
Milligrams (mg)
For vitamins present in larger amounts, such as E and C.
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