15 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 - 15 nM and 15 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 15 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 6.0096 ng/mL |
| Testosterone | 288.42 | 4.3263 ng/mL |
| Estradiol (E2) | 272.38 | 4.0857 ng/mL |
| Cortisol | 362.46 | 5.4369 ng/mL |
| Progesterone | 314.47 | 4.71705 ng/mL |
| Vitamin A (Retinol) | 286.45 | 4.29675 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 6.46065 ng/mL |
| Aldosterone | 360.45 | 5.40675 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 4.3263 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 5.52735 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 20.331 ng/mL |
| Folate (Folic Acid) | 441.4 | 6.621 ng/mL |
| Melatonin | 232.28 | 3.4842 ng/mL |
| Thyroxine (T4) | 776.87 | 11.65305 ng/mL |
| Triiodothyronine (T3) | 651.01 | 9.76515 ng/mL |
| Androstenedione | 286.41 | 4.29615 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.
If your report shows 15 nmol/L of 25-Hydroxyvitamin D and you need it in ng/mL, the conversion comes down to one formula and two quick calculations.
First, multiply 15 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 15 × 400.64 = 6009.6.
Next, divide that result by 1000 to convert nanomoles to nanograms: 6009.6 ÷ 1000 = 6.0096.
In short, 15 nmol/L is 6.0096 ng/mL. Try a different number in the calculator above to see it recalculate live.
