Cortisol unit converter
Convert cortisol between µg/dL, nmol/L and ng/mL. Type in either box. The factors come from our catalog and are checked by code.
AI-verified against cited sources. Awaiting expert reviewLast reviewed 2026-10-03
1 µg/dL = 27.5893 nmol/L. Nothing you type here leaves your browser.
The conversion
- 1 µg/dL = 27.59 nmol/LFrom µg/dL to nmol/L: multiply by 27.59. Back again: divide by 27.59.
- 1 µg/dL = 10 ng/mLFrom µg/dL to ng/mL: multiply by 10. Back again: divide by 10.
Mass and molar units are linked by the molecular weight: 362.46 g/mol (Cortisol (hydrocortisone), C21H30O5. PubChem lists 362.5 (rounded); ARUP and Mayo both use a x27.6 factor for µg/dL to nmol/L.). Source: PubChem (NIH).
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Cortisol page.
| Who | µg/dL | nmol/L | ng/mL |
|---|---|---|---|
| 18+, morning draw | 6.2–19.4 | 171–535 | 62–194 |
| 18+, afternoon draw | 2.3–11.9 | 63–328 | 23–119 |