125 nmol/L to ng/mL Converter
Convert any lab value from nmol/L to ng/mL (or back) for 16 hormones and vitamins - pick the molecule below and this calculator uses its exact molecular weight. Also written "nM" or "nmol/l" on some lab reports - 125 nM and 125 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 125 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 50.08 ng/mL |
| Testosterone | 288.42 | 36.0525 ng/mL |
| Estradiol (E2) | 272.38 | 34.0475 ng/mL |
| Cortisol | 362.46 | 45.3075 ng/mL |
| Progesterone | 314.47 | 39.30875 ng/mL |
| Vitamin A (Retinol) | 286.45 | 35.80625 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 53.83875 ng/mL |
| Aldosterone | 360.45 | 45.05625 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 36.0525 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 46.06125 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 169.425 ng/mL |
| Folate (Folic Acid) | 441.4 | 55.175 ng/mL |
| Melatonin | 232.28 | 29.035 ng/mL |
| Thyroxine (T4) | 776.87 | 97.10875 ng/mL |
| Triiodothyronine (T3) | 651.01 | 81.37625 ng/mL |
| Androstenedione | 286.41 | 35.80125 ng/mL |
Each row uses the same value entered above, converted with that molecule's own molecular weight. Custom molecular weight isn't included here since it has no fixed value of its own.
Here’s a worked example for anyone converting 125 nmol/L of Vitamin D into ng/mL by hand, before double-checking it against the calculator above.
First, multiply 125 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 125 × 400.64 = 50080.
Next, divide that result by 1000 to convert nanomoles to nanograms: 50080 ÷ 1000 = 50.08.
End result: 125 nmol/L = 50.08 ng/mL. Change the value in the calculator above to convert something else.
