Hormones

PTH unit converter

Parathyroid hormone (calcium regulation)

Also known as: Parathyroid hormone, Parathormone, Parathyrin, Intact PTH, iPTH, Parathormon

Converter

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

pmol/L pg/mL ng/dL

Worked example

37.5 pg/mL (middle of the reference range) = 3.98 pmol/L

Conversion formulas

pmol/L	pmol/L = pg/mL × 0.1061	pg/mL = pmol/L × 9.425
ng/dL	ng/dL = pg/mL × 0.1	pg/mL = ng/dL × 10

Reference range

Unit	Adults
pmol/L	1.061 – 6.897
pg/mL	10 – 65
ng/dL	1 – 6.5

Source: MedlinePlus (NLM): Parathyroid hormone (PTH) blood test · Last reviewed: 2026-10-14

Note from the source: 10-65 pg/mL; interpret together with serum calcium (MedlinePlus)

Frequently asked questions

How do I convert PTH from pg/mL to pmol/L?

pmol/L = pg/mL × 0.1061. In the other direction: pg/mL = pmol/L × 9.425.

What is the reference range of PTH?

For adults the range is 10 – 65 pg/mL (MedlinePlus (NLM): Parathyroid hormone (PTH) blood 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 PTH?

Common units are pmol/L, pg/mL, ng/dL.