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Progesterone nmol/L → ng/mL

Convert progesterone from nmol/L to ng/mL

Sources last checked: 2026-11-03

Progesterone nmol/L → ng/mL

Convert progesterone from nmol/L to ng/mL

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Converts units only; reference ranges depend on the laboratory, the assay and the patient.

Source: AMA Manual of Style, 11th ed. (Oxford Academic) — Units of measure converter, Table 2: Selected laboratory tests and conversion factors.Open

What is the Progesterone nmol/L → ng/mL?

UK and many European laboratories report serum progesterone in nmol/L; laboratories in Germany, Austria, Turkey and the USA mostly use ng/mL. This converter divides by 3.180 (about × 0.3145), the factor derived from the molar mass of progesterone (314.5 g/mol).

When to use it

  • Translating a nmol/L progesterone from a European report into ng/mL
  • Reading US, German or Turkish literature that uses ng/mL
  • Comparing luteal-phase or early-pregnancy results between laboratories
  • Teaching and exam preparation

When not to use it

  • 17-hydroxyprogesterone results (e.g. in congenital adrenal hyperplasia screening) — a different analyte
  • Patients on synthetic progestogens if the question is the drug level; progesterone assays do not detect them
  • Single values used without cycle timing or clinical context

How it is calculated

Progesterone (ng/mL) = progesterone (nmol/L) ÷ 3.180

Clinical pearls and limitations

  • Converts units only; reference ranges depend on the laboratory, the assay and the patient.
  • 1 nmol/L ≈ 0.3145 ng/mL; 60 nmol/L ≈ 18.87 ng/mL.
  • Give ng/mL with two decimals at most; the analytical precision does not support more.
  • Pulsatile secretion in the luteal phase means repeat values can differ markedly within hours.
  • Thresholds for ovulation, luteal support or early pregnancy are guideline- and assay-dependent and are not part of the conversion.

Frequently asked questions

How do I convert progesterone from nmol/L to ng/mL?

Divide by 3.180. For example, 60 nmol/L ÷ 3.180 = 18.87 ng/mL and 5 nmol/L ÷ 3.180 = 1.57 ng/mL.

What is 1 nmol/L of progesterone in ng/mL?

About 0.3145 ng/mL, from progesterone's molar mass of 314.5 g/mol.

Does dydrogesterone affect the progesterone result?

Progesterone immunoassays do not measure dydrogesterone, so serum progesterone does not reflect exposure to it.

Evidence and guidelines

  1. Primary source: AMA Manual of Style, 11th ed. (Oxford Academic) — Units of measure converter, Table 2: Selected laboratory tests and conversion factors.
  2. PubChem compound summary: progesterone (CID 5994), molecular weight 314.5 g/mol.

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For healthcare professionals and medical students. These tools support, and do not replace, clinical judgement. Always check results against the original source and your local protocols.