100 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 - 100 nM and 100 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 100 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 40.064 ng/mL |
| Testosterone | 288.42 | 28.842 ng/mL |
| Estradiol (E2) | 272.38 | 27.238 ng/mL |
| Cortisol | 362.46 | 36.246 ng/mL |
| Progesterone | 314.47 | 31.447 ng/mL |
| Vitamin A (Retinol) | 286.45 | 28.645 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 43.071 ng/mL |
| Aldosterone | 360.45 | 36.045 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 28.842 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 36.849 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 135.54 ng/mL |
| Folate (Folic Acid) | 441.4 | 44.14 ng/mL |
| Melatonin | 232.28 | 23.228 ng/mL |
| Thyroxine (T4) | 776.87 | 77.687 ng/mL |
| Triiodothyronine (T3) | 651.01 | 65.101 ng/mL |
| Androstenedione | 286.41 | 28.641 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.
Turning 100 nmol/L into ng/mL takes just two steps once you have the molecular weight of Vitamin D on hand. Here’s the full breakdown.
1) Multiply 100 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 100 × 400.64 = 40064.
2) Divide that result by 1000 to convert nanomoles to nanograms: 40064 ÷ 1000 = 40.064.
In short, 100 nmol/L is 40.064 ng/mL. Try a different number in the calculator above to see it recalculate live.
