12 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 - 12 nM and 12 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 12 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 4.80768 ng/mL |
| Testosterone | 288.42 | 3.46104 ng/mL |
| Estradiol (E2) | 272.38 | 3.26856 ng/mL |
| Cortisol | 362.46 | 4.34952 ng/mL |
| Progesterone | 314.47 | 3.77364 ng/mL |
| Vitamin A (Retinol) | 286.45 | 3.4374 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 5.16852 ng/mL |
| Aldosterone | 360.45 | 4.3254 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 3.46104 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 4.42188 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 16.2648 ng/mL |
| Folate (Folic Acid) | 441.4 | 5.2968 ng/mL |
| Melatonin | 232.28 | 2.78736 ng/mL |
| Thyroxine (T4) | 776.87 | 9.32244 ng/mL |
| Triiodothyronine (T3) | 651.01 | 7.81212 ng/mL |
| Androstenedione | 286.41 | 3.43692 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.
12 nmol/L doesn’t mean much on its own if the range you’re comparing it to is in ng/mL. Below is the exact math to bridge the two units.
1) Multiply 12 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 12 × 400.64 = 4807.68.
2) Divide that result by 1000 to convert nanomoles to nanograms: 4807.68 ÷ 1000 = 4.80768.
So 12 nmol/L works out to 4.80768 ng/mL. Use the calculator above if you need to convert a different value.
