Prolactin unit converter
Convert prolactin between ng/mL, mIU/L, pmol/L and nmol/L. 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 ng/mL = 21.1999 mIU/L. Nothing you type here leaves your browser.
The conversion
- 1 ng/mL = 21.2 mIU/LFrom ng/mL to mIU/L: multiply by 21.2. Back again: divide by 21.2.
- 1 ng/mL = 43.48 pmol/LFrom ng/mL to pmol/L: multiply by 43.48. Back again: divide by 43.48.
- 1 ng/mL = 0.04348 nmol/LFrom ng/mL to nmol/L: divide by 23. Back again: multiply by 23.
Mass and molar units are linked by the molecular weight: 23,000 g/mol (monomeric human prolactin (about 23 kDa)). Source: Journal of Clinical Medicine (Samperi, Lithgow, Karavitaki).
Common values
From zero to about twice the usual upper limit, plus the usual limits themselves.
| ng/mL | mIU/L | pmol/L | nmol/L |
|---|---|---|---|
| 2.1 | 45 | 91 | 0.09 |
| 2.8 | 59 | 122 | 0.12 |
| 10 | 212 | 435 | 0.43 |
| 17.7 | 375 | 770 | 0.77 |
| 20 | 424 | 870 | 0.87 |
| 29.2 | 619 | 1,270 | 1.27 |
| 30 | 636 | 1,304 | 1.3 |
| 40 | 848 | 1,739 | 1.74 |
| 50 | 1,060 | 2,174 | 2.17 |
Usual ranges in each unit
What labs print as the reference range, by who was tested. Sources for each range are on the Prolactin page.
| Who | ng/mL | mIU/L | pmol/L | nmol/L |
|---|---|---|---|---|
| Men, 10+ | 2.1–17.7 | 45–375 | 91–770 | 0.09–0.77 |
| Women, 10+ | 2.8–29.2 | 59–619 | 122–1,270 | 0.12–1.27 |
| Women, postmenopausal | 1.8–20.3 | 38–430 | 78–883 | 0.08–0.88 |
| 1–9 | 2.1–17.7 | 45–375 | 91–770 | 0.09–0.77 |
| Women, pregnancy t1 | 29.2–168.4 | 619–3,571 | 1,269–7,323 | 1.27–7.32 |
| Women, pregnancy t2 | 67.3–251.4 | 1,427–5,330 | 2,926–10,932 | 2.93–10.93 |
| Women, pregnancy t3 | 192.1–457.5 | 4,073–9,699 | 8,352–19,890 | 8.35–19.89 |