Diabetes & metabolism

Insulin unit converter

Blood insulin (fasting level)

Also known as: Fasting insulin, Serum insulin, Insuline, Insulina

Converter

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

µIU/mL = mIU/L pmol/L

Worked example

81 pmol/L (middle of the reference range) = 13.5 µIU/mL

Conversion formulas

µIU/mL = mIU/L	µIU/mL = pmol/L × 0.1667	pmol/L = µIU/mL × 6

Good to know

Insulin is reported in pmol/L or µIU/mL. The page converts between the units only.

µIU/mL × 6 = pmol/L (exact factor 6).
The range shown is a guide from the named source; targets and reference ranges differ between laboratories, methods and indications, so compare with the range on your own report.

Reference range

Unit	Adults
µIU/mL = mIU/L	2 – 25
pmol/L	12 – 150

Source: Newcastle Hospitals Laboratories: Insulin · Last reviewed: 2026-10-19

Note from the source: Adults 12-150 pmol/L (Newcastle Hospitals Laboratories); fasting values are lower, and the value needs a matching glucose to be interpreted

Frequently asked questions

How do I convert Insulin from pmol/L to µIU/mL?

µIU/mL = pmol/L × 0.1667. In the other direction: pmol/L = µIU/mL × 6.

What is the reference range of Insulin?

For adults the range is 12 – 150 pmol/L (Newcastle Hospitals Laboratories: Insulin). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Insulin?

Common units are µIU/mL, pmol/L.