How do I convert AFP from ng/mL to IU/mL?

IU/mL = ng/mL × 0.8264. For example, 4 ng/mL equals 3.31 IU/mL.

How many IU/mL are 4 ng/mL?

4 ng/mL equal 3.31 IU/mL (AFP).

Tumor markers

IU/mL = ng/mL × 0.8264

Enter a value in any unit and all other units fill in.

ng/mL IU/mL

ng/mL → IU/mL	IU/mL = ng/mL × 0.8264
IU/mL → ng/mL	ng/mL = IU/mL × 1.21

Highlighted: values inside the adult reference range.

0.7 – 9.3 ng/mL = 0.5785 – 7.686 IU/mL

Source: MedlinePlus (NLM): Alpha-fetoprotein · Last reviewed: 2026-10-14