This nmol/L to ng/dL calculator converts molar concentration into mass concentration for molecules commonly found on hormone and endocrine lab reports. Testosterone is the default because total testosterone nmol/L to ng/dL is the most common use case for this conversion. For ng/mL reporting, use the nmol/L to ng/mL calculator.
The conversion is molecule-specific. nmol/L counts the number of molecules in a liter, while ng/dL measures mass in a deciliter. That means testosterone, progesterone, cortisol, aldosterone, estradiol, and DHEA cannot all use one universal factor.
Quick nmol/L to ng/dL Reference
These quick factors cover common hormone-related molecules. Use the calculator above when switching molecules or converting ng/dL back to nmol/L.
nmol/L to ng/dL Formula
To convert nmol/L to ng/dL, multiply the nmol/L value by the molecular weight and divide by 10. In the calculator, this is shown as a molecule-specific factor.
ng/dL = nmol/L x molecular weight / 10 For testosterone, the factor is about 28.84. That means 10 nmol/L x 28.84 = 288.4 ng/dL. Progesterone, cortisol, aldosterone, and other molecules use different factors because their molecular weights are different.
ng/dL to nmol/L Formula
To convert ng/dL back to nmol/L, divide the ng/dL value by the molecule-specific conversion factor. For example, 500 ng/dL testosterone divided by 28.84 is about 17.34 nmol/L.
nmol/L = ng/dL / conversion factor Testosterone nmol/L to ng/dL Chart
Testosterone is the most common nmol/L to ng/dL conversion. This chart uses 1 nmol/L testosterone = 28.84 ng/dL.
| Testosterone nmol/L | Testosterone ng/dL |
|---|---|
| 1.0 nmol/L | 28.8 ng/dL |
| 2.0 nmol/L | 57.7 ng/dL |
| 3.0 nmol/L | 86.5 ng/dL |
| 5.0 nmol/L | 144.2 ng/dL |
| 7.0 nmol/L | 201.9 ng/dL |
| 10.0 nmol/L | 288.4 ng/dL |
| 12.0 nmol/L | 346.1 ng/dL |
| 15.0 nmol/L | 432.6 ng/dL |
| 20.0 nmol/L | 576.8 ng/dL |
| 25.0 nmol/L | 721.0 ng/dL |
| 30.0 nmol/L | 865.2 ng/dL |
| 35.0 nmol/L | 1009.4 ng/dL |
| 40.0 nmol/L | 1153.6 ng/dL |
Conversion Factors by Molecule
Use the correct molecule row before converting. Testosterone and progesterone are close, but they are not identical, and cortisol or aldosterone use still different factors.
| Molecule | Molecular weight | nmol/L to ng/dL | ng/dL to nmol/L |
|---|---|---|---|
| Testosterone | 288.42 g/mol | multiply by 28.84 | divide by 28.84 |
| Progesterone | 314.47 g/mol | multiply by 31.45 | divide by 31.45 |
| Cortisol | 362.46 g/mol | multiply by 36.25 | divide by 36.25 |
| Aldosterone | 360.44 g/mol | multiply by 36.04 | divide by 36.04 |
| Estradiol (E2) | 272.38 g/mol | multiply by 27.24 | divide by 27.24 |
| Estrone (E1) | 270.37 g/mol | multiply by 27.04 | divide by 27.04 |
| DHEA | 288.43 g/mol | multiply by 28.84 | divide by 28.84 |
| Androstenedione | 286.41 g/mol | multiply by 28.64 | divide by 28.64 |
| 17-Hydroxyprogesterone | 330.46 g/mol | multiply by 33.05 | divide by 33.05 |
Why the Factor Is Not Universal
nmol/L is based on molecule count, while ng/dL is based on mass. Molecular weight tells you how much mass is represented by a given number of molecules, so the factor changes with the molecule being converted.
Important Safety Note
This page is for unit conversion only. It does not interpret testosterone, adrenal, fertility, or hormone-related lab results. Reference ranges vary by assay, lab, age, sex, medication use, and clinical context.
Frequently Asked Questions
How do you convert nmol/L to ng/dL?
Multiply the nmol/L value by the molecule-specific factor. For testosterone, use about 28.84.
How do you convert ng/dL to nmol/L?
Divide the ng/dL value by the molecule-specific factor. For testosterone, 500 ng/dL divided by 28.84 is about 17.34 nmol/L.
What is 10 nmol/L testosterone in ng/dL?
10 nmol/L testosterone is approximately 288 ng/dL. The calculation is 10 x 28.84.
Is nmol/L to ng/dL always multiply by 28.84?
No. Multiplying by 28.84 is used for testosterone. Other molecules use different factors.
References for Conversion Factors
Conversion factors were checked against public laboratory unit conversion references, including Mayo Clinic Laboratories SI conversion tables, testosterone conversion references, and molecular-weight based conversion formulas.