tracylee--I didn't answer your question, simply because I don't know the answer. Doh! lol. But, after I saw your last response, I went to Yahoo answers. They seem to know a lot more than me! Go figure...

I entered "1ml= iu". It gave me the following answer:

"An international unit is an arbitrary amount of a substance agreed upon by scientists and doctors. A milliliter is a measure of volume that is equal to one-thousandth of a liter (or slightly less than a quarter of a teaspoon).

Some medical tests report results using international units (IU) per milliliter (mL).

Here is an example: Heparin is manufactured by many different pharmaceutical companies. The strength and presentation of the medication varies widely according to the manufacturer of the product. Examples of available strengths include 100 IU (international units) per mL, 1,000 IU per mL, 10,000 IU per mL, and 25,000 IU per mL"

and elitefitnessl.com answered a similar question with:

"there is no direct correlation or conversion between IU's and ml's"

and--

"IU's cannot be equated to a volume, since this is arbitrary. The IU's/ml is determined by the person who makes the solution."
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Sooooooo, I am not sure, but it sounds as if there is not one mathematic equation to convert ml's to iu's, and that it differs among various liquids. And by the person who makes the solution according to the last quote.

Short answer, no I do not know the answer to your original question. lol

Whyyyyyyyy did I think I could help on this?! lmao

Hey, I was not a science or math major! :-D

Yeah, what grammy said...lololol