Urine free cortisol unit converter
Convert urine free cortisol between µg/24 h and nmol/24 h. Type in either box. The factors come from our catalog and are checked by code.
AI-drafted. Awaiting verificationLast reviewed 2026-10-03
1 µg/24 h = 2.7589 nmol/24 h. Nothing you type here leaves your browser.
The conversion
- 1 µg/24 h = 2.759 nmol/24 hFrom µg/24 h to nmol/24 h: multiply by 2.759. Back again: divide by 2.759.
Mass and molar units are linked by the molecular weight: 362.46 g/mol (cortisol (hydrocortisone), C21H30O5. PubChem lists 362.5 (rounded); Mayo's x2.76 factor for mcg to nmol agrees.). Source: NCBI PubChem.
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| µg/24 h | nmol/24 h |
|---|---|
| 3 | 8 |
| 5 | 14 |
| 6 | 17 |
| 20 | 55 |
| 40 | 110 |
| 42 | 116 |
| 49 | 135 |
| 60 | 166 |
| 64 | 177 |
| 80 | 221 |
| 100 | 276 |
| 120 | 331 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Urine free cortisol page.
| Who | µg/24 h | nmol/24 h |
|---|---|---|
| Men, 18–80 | 5–64 | 14–177 |
| Women, 18–80 | 6–42 | 17–116 |
| 81+ | 3–49 | 8–135 |