Urine & CSF

Urinary free cortisol (24-h) unit converter

Cushing syndrome screening test using a 24-hour urine collection

Also known as: UFC, 24-hour urine cortisol

Converter

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

µg/24 h nmol/24 h

Worked example

30 µg/24 h (middle of the reference range) = 82.8 nmol/24 h

Conversion formulas

nmol/24 h	nmol/24 h = µg/24 h × 2.759	µg/24 h = nmol/24 h × 0.3625

Reference range

Unit	Adults	Men	Women
µg/24 h	0 – 60	0 – 60	0 – 45
nmol/24 h	0 – 165.5	0 – 165.5	0 – 124.2

Source: MedlinePlus (NLM): Cortisol urine test · Last reviewed: 2026-10-14

Note from the source: Below 45 µg/24 h (124 nmol/24 h) for women and below 60 µg/24 h (165 nmol/24 h) for men (MedlinePlus)

Frequently asked questions

How do I convert Urinary free cortisol (24-h) from µg/24 h to nmol/24 h?

nmol/24 h = µg/24 h × 2.759. In the other direction: µg/24 h = nmol/24 h × 0.3625.

What is the reference range of Urinary free cortisol (24-h)?

For adults the range is 0 – 60 µg/24 h (MedlinePlus (NLM): Cortisol urine test). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Urinary free cortisol (24-h)?

Common units are µg/24 h, nmol/24 h.