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Estradiol (E2) Unit Converter
Estradiol (E2) is the most potent endogenous estrogen, primarily produced by the granulosa cells of the ovaries in premenopausal women and, to a lesser extent, by the testes in men and the adrenal cortex. It is responsible for the development of secondary sexual characteristics and the regulation of the menstrual cycle.
Clinically, measuring Estradiol is essential for evaluating infertility, monitoring ovulation induction (IVF), diagnosing precocious or delayed puberty, and investigating menstrual irregularities. Levels fluctuate significantly throughout the menstrual cycle. Accurate unit conversion is critical, especially in fertility medicine where protocols may vary between clinics using mass units (pg/mL) and those using molar units (pmol/L).
SI Units
RecommendedPicomoles per liter (Standard International).
Conventional Units
Clinical Context
Reference Ranges: Levels vary widely by cycle phase.
• Follicular Phase: 30 – 100 pg/mL (110 – 367 pmol/L)
• Pre-ovulatory Peak: > 200 pg/mL (> 734 pmol/L)
• Post-menopausal: < 15 pg/mL (< 55 pmol/L)
In men, levels are typically 10 – 40 pg/mL. High levels in men can cause gynecomastia. The conversion factor relies on the molecular weight of 272.38 g/mol: 1 pg/mL ≈ 3.67 pmol/L.
Clinical References
How to Use This Calculator
Follow these steps to get accurate clinical conversions instantly.
Enter Values
Input your laboratory results into the corresponding unit field (e.g., pg/mL). You can use either dot or comma decimals.
Automatic Conversion
The calculator works in real-time. As you type in one field, all other units (like pmol/L) are instantly updated.
Verify Units
Check the SI Units section. pmol/L is the standard unit for reproductive hormones in most of the world.
Reset
Use the Clear button to reset all fields before starting a new calculation.
Frequently Asked Questions & Tips
Yes. 1 pg/mL is exactly equal to 1 ng/L.
SI units (pmol/L) are used in most international guidelines for IVF and menopause management.