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Hormones

Prolactin: convert ng/mL to mIU/L

mIU/L = ng/mL × 21.2

Calculator

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

Conversion formulas

ng/mL → mIU/LmIU/L = ng/mL × 21.2
mIU/L → ng/mLng/mL = mIU/L × 0.04717

Conversion table

Highlighted: values inside the adult reference range.

ng/mLmIU/L
5106
10212
15318
20424
25530
30636
35742
40848
45954
501060
551166
601272

Reference range

0 – 25 ng/mL = 0 – 530 mIU/L

Source: MedlinePlus (NLM): Prolactin blood test · Last reviewed: 2026-10-14

Frequently asked questions

How do I convert Prolactin from ng/mL to mIU/L?

mIU/L = ng/mL × 21.2. For example, 10 ng/mL equals 212 mIU/L.

How many mIU/L are 10 ng/mL?

10 ng/mL equal 212 mIU/L (Prolactin).

How do I convert Prolactin from mIU/L back to ng/mL?

ng/mL = mIU/L × 0.04717.

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