Hormones

IGF-1 unit converter

Insulin-like growth factor 1 (growth hormone marker, age-dependent)

Also known as: IGF-I, Insulin-like growth factor 1, Insulin-like growth factor I, Somatomedin C, Somatomédine C, Somatomedina C

Converter

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

nmol/L ng/mL mg/L µg/dL

Worked example

170 ng/mL (middle of the reference range) = 22.2 nmol/L

Conversion formulas

nmol/L	nmol/L = ng/mL × 0.1307	ng/mL = nmol/L × 7.649
mg/L	mg/L = ng/mL × 0.001	ng/mL = mg/L × 1000
µg/dL	µg/dL = ng/mL × 0.1	ng/mL = µg/dL × 10

Reference range

Unit	Adults
nmol/L	5.229 – 39.22
ng/mL	40 – 300
mg/L	0.04 – 0.3
µg/dL	4 – 30

Source: UW Medicine Laboratory Test Guide, Insulin Like Growth Factor 1 · Last reviewed: 2026-10-14

Note from the source: Strongly age-dependent; 40-300 ng/mL approximates ages 30-50.

Frequently asked questions

How do I convert IGF-1 from ng/mL to nmol/L?

nmol/L = ng/mL × 0.1307. In the other direction: ng/mL = nmol/L × 7.649.

What is the reference range of IGF-1?

For adults the range is 40 – 300 ng/mL (UW Medicine Laboratory Test Guide, Insulin Like Growth Factor 1). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for IGF-1?

Common units are nmol/L, ng/mL, mg/L, µg/dL.