This pmol/L to pg/mL calculator converts between picomoles per liter and picograms per milliliter for common hormone and endocrine lab values. Estradiol is the default molecule because estradiol pmol/L to pg/mL is one of the most common conversions for this unit pair. For larger molar units, try the nmol/L to ng/mL calculator.
The conversion depends on molecular weight. A pmol/L value counts molecules, while pg/mL is based on mass. Estradiol, free testosterone, free T3, free T4, ACTH, and PTH therefore need different conversion factors.
Quick pmol/L to pg/mL Reference
These quick factors cover common molecules for this unit pair. Use the calculator above to switch molecules or convert pg/mL back to pmol/L.
pmol/L to pg/mL Formula
To convert pmol/L to pg/mL, multiply the pmol/L value by the molecular weight and divide by 1000. In the calculator, this is shown as a molecule-specific factor.
pg/mL = pmol/L x molecular weight / 1000 For estradiol, the factor is about 0.2724. That means 367 pmol/L x 0.2724 = 99.95 pg/mL. For ACTH, the factor is much larger because ACTH has a much higher molecular weight.
pg/mL to pmol/L Formula
To convert pg/mL back to pmol/L, divide the pg/mL value by the molecule-specific conversion factor. For example, 100 pg/mL estradiol divided by 0.2724 is about 367 pmol/L.
pmol/L = pg/mL / conversion factor Estradiol pmol/L to pg/mL Chart
Estradiol is often reported in pmol/L in some countries and pg/mL in others. This chart uses 1 pmol/L estradiol = 0.2724 pg/mL.
| Estradiol pmol/L | Estradiol pg/mL |
|---|---|
| 50.0 pmol/L | 13.6 pg/mL |
| 75.0 pmol/L | 20.4 pg/mL |
| 100.0 pmol/L | 27.2 pg/mL |
| 150.0 pmol/L | 40.9 pg/mL |
| 200.0 pmol/L | 54.5 pg/mL |
| 250.0 pmol/L | 68.1 pg/mL |
| 300.0 pmol/L | 81.7 pg/mL |
| 367.0 pmol/L | 100.0 pg/mL |
| 500.0 pmol/L | 136.2 pg/mL |
| 750.0 pmol/L | 204.3 pg/mL |
| 1000.0 pmol/L | 272.4 pg/mL |
| 1500.0 pmol/L | 408.6 pg/mL |
| 2000.0 pmol/L | 544.8 pg/mL |
Conversion Factors by Molecule
Use the correct molecule row before converting. Estradiol, free T3, free T4, ACTH, and PTH do not share one universal pmol/L to pg/mL factor.
| Molecule | Molecular weight | pmol/L to pg/mL | pg/mL to pmol/L |
|---|---|---|---|
| Estradiol (E2) | 272.38 g/mol | multiply by 0.2724 | divide by 0.2724 |
| Estrone (E1) | 270.37 g/mol | multiply by 0.2704 | divide by 0.2704 |
| Free testosterone | 288.42 g/mol | multiply by 0.2884 | divide by 0.2884 |
| Free T3 | 650.97 g/mol | multiply by 0.6510 | divide by 0.6510 |
| Free T4 | 776.87 g/mol | multiply by 0.7769 | divide by 0.7769 |
| ACTH | 4540 g/mol | multiply by 4.5400 | divide by 4.5400 |
| Parathyroid hormone (PTH) | 9425 g/mol | multiply by 9.4250 | divide by 9.4250 |
| Estriol (E3) | 288.38 g/mol | multiply by 0.2884 | divide by 0.2884 |
Why the Result Changes by Molecule
pmol/L is a count-based concentration unit, while pg/mL is a mass-based concentration unit. Molecular weight tells you how much mass is represented by a given number of molecules. That is why the conversion factor changes from one molecule to another.
Important Safety Note
This page is for unit conversion only. It does not interpret estradiol, thyroid, adrenal, parathyroid, fertility, or hormone therapy results. Always compare lab values with the reference range from the same laboratory and discuss interpretation with a clinician.
Frequently Asked Questions
How do you convert pmol/L to pg/mL?
Multiply the pmol/L value by the molecule-specific factor. The factor is the molecular weight divided by 1000.
How do you convert pg/mL to pmol/L?
Divide the pg/mL value by the molecule-specific factor. For estradiol, divide pg/mL by about 0.2724.
What is 367 pmol/L estradiol in pg/mL?
367 pmol/L estradiol is about 100 pg/mL. The calculation is 367 x 0.2724.
Is pmol/L to pg/mL the same for every molecule?
No. The conversion depends on molecular weight. Estradiol, free testosterone, free T3, free T4, ACTH, and PTH all use different factors.
References for Conversion Factors
Conversion factors were checked against public laboratory unit conversion references, including Mayo Clinic Laboratories SI conversion tables, UNITSLAB estradiol conversion references, and molecular-weight based conversion formulas.