Neurology & psychiatry

Cortisol (saliva, morning) unit converter

Free, unbound cortisol in saliva; used to screen for Cushing syndrome and adrenal disorders

Also known as: Salivary free cortisol

Converter

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

µg/dL ng/mL nmol/L ng/dL ng/L pmol/L

Worked example

4.55 nmol/L (middle of the reference range) = 0.165 µg/dL

Conversion formulas

µg/dL	µg/dL = nmol/L × 0.03625	nmol/L = µg/dL × 27.59
ng/mL	ng/mL = nmol/L × 0.3625	nmol/L = ng/mL × 2.759
ng/dL	ng/dL = nmol/L × 36.25	nmol/L = ng/dL × 0.02759
ng/L	ng/L = nmol/L × 362.5	nmol/L = ng/L × 0.002759
pmol/L	pmol/L = nmol/L × 1000	nmol/L = pmol/L × 0.001

Reference range

Unit	Adults
µg/dL	0 – 0.3298
ng/mL	0 – 3.298
nmol/L	0 – 9.1
ng/dL	0 – 329.8
ng/L	0 – 3298
pmol/L	0 – 9100

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

Note from the source: Morning below 9.1 nmol/L (Newcastle Hospitals Laboratories); assay-specific

Frequently asked questions

How do I convert Cortisol (saliva, morning) from nmol/L to µg/dL?

µg/dL = nmol/L × 0.03625. In the other direction: nmol/L = µg/dL × 27.59.

What is the reference range of Cortisol (saliva, morning)?

For adults the range is 0 – 9.1 nmol/L (Newcastle Hospitals Laboratories: Salivary cortisol). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Cortisol (saliva, morning)?

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