Estradiol pmol/L → pg/mL
Convert estradiol from pmol/L to pg/mL
Sources last checked: 2026-11-03
Estradiol pmol/L → pg/mL
Convert estradiol from pmol/L to pg/mL
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Estradiol pmol/L → pg/mL?
Many European laboratories and guidelines report oestradiol (E2) in pmol/L, whereas laboratories in Turkey, the USA and much of the German-speaking region use pg/mL. This converter divides by 3.671 (about × 0.2724), the factor derived from the molar mass of 17β-oestradiol (272.4 g/mol).
When to use it
- Translating a pmol/L oestradiol into pg/mL for comparison with your laboratory's report
- Reading US or Turkish fertility literature that uses pg/mL
- Comparing monitoring results from different clinics during assisted reproduction
- Teaching and exam preparation
When not to use it
- Oral contraceptive users when the question is ethinylestradiol exposure — it is not what the assay measures
- Comparing low values from immunoassay and LC-MS/MS as if they were equivalent
- Oestrone or oestriol results, which require their own molar mass
How it is calculated
Estradiol (pg/mL) = estradiol (pmol/L) ÷ 3.671
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- 1 pmol/L ≈ 0.2724 pg/mL; 200 pmol/L ≈ 54 pg/mL.
- Round pg/mL to whole numbers.
- Results near the lower limit of quantification of an immunoassay can differ substantially between methods.
- Interpretation depends on cycle day, life stage and therapy; reference ranges come from the reporting laboratory.
Frequently asked questions
How do I convert estradiol from pmol/L to pg/mL?
Divide by 3.671. For example, 200 pmol/L ÷ 3.671 = 54 pg/mL and 1000 pmol/L ÷ 3.671 = 272 pg/mL.
What is 1 pmol/L of estradiol in pg/mL?
About 0.2724 pg/mL, from oestradiol's molar mass of 272.4 g/mol.
Why are my estradiol results different between two labs?
Apart from units, immunoassays differ in calibration and specificity, especially at low concentrations. Convert the unit first, then consider the method.
Evidence and guidelines
Have a follow-up question?
Medelix answers clinical questions from current guidelines and studies — every statement with its source.
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<p><a href="https://medelix.ai/en/calculators/estradiol-pmol-l-to-pg-ml">Estradiol pmol/L → pg/mL calculator by Medelix</a></p>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.