Estradiol
Estradiol is the main female sex hormone. In women it changes a lot through the cycle.
At a glance
- Sample
- Blood
- Units
- pg/mL (US), pmol/L (Europe)
- Often looked at with
- Testosterone, Cortisol, Prolactin
- Preparation
- The level depends on the day of the menstrual cycle, so for women with a cycle the test is often scheduled for a particular day.
Units: pg/mL and pmol/L
US labs usually print estradiol in pg/mL, most European labs in pmol/L. To convert, multiply pg/mL by 3.6713.
pmol/L = pg/mL × 3.6713 · molar mass 272.38 g/mol
This converter changes units only. It doesn’t tell you whether a number is in or out of any range: that depends on the range printed by your own lab, and on your doctor. Soma does not diagnose and is not medical advice.
Why lab ranges differ
Each lab sets its reference range for its own method and analyser, and many ranges differ by age and sex. Two labs can print different ranges for the same blood, so a result is read against the range on its own report, not against a number from another lab or a website.
Soma charts every estradiol result against the range printed by the lab that measured it.
Questions
How do I convert estradiol from pg/mL to pmol/L?
Multiply pg/mL by 3.6713. For example, 100 pg/mL is 367.1 pmol/L.
Why does my lab’s estradiol range differ from another lab’s?
Each lab sets its range for its own method and equipment, and many ranges differ by age and sex. That’s why a result is best read against the range printed on the same report.
How do I prepare for a estradiol test?
The level depends on the day of the menstrual cycle, so for women with a cycle the test is often scheduled for a particular day. Follow your lab’s instructions.
Related tests
Got a lab report with Estradiol?
Share it to Soma: it reads every row on your phone, with no account and no upload, and puts your estradiol on one chart with your earlier results, each against the range your lab printed.
Sources
- Estrogen Levels Test — MedlinePlus, U.S. National Library of Medicine.
- Units: PubChem: Estradiol (estradiol), molar mass 272.38 g/mol, as the Soma app converts.
Mention of a source doesn’t mean it endorses Soma. This page explains the test; it doesn’t diagnose and is not medical advice. Talk to your doctor about what your results mean.