Health Information and Tools > Tests & Treatments >  International units per millilitre (IU/mL)

Main Content

International units per millilitre (IU/mL)

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

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

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.