25.5 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 - 25.5 nM and 25.5 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 25.5 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 10.21632 ng/mL |
| Testosterone | 288.42 | 7.35471 ng/mL |
| Estradiol (E2) | 272.38 | 6.94569 ng/mL |
| Cortisol | 362.46 | 9.24273 ng/mL |
| Progesterone | 314.47 | 8.018985 ng/mL |
| Vitamin A (Retinol) | 286.45 | 7.304475 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 10.983105 ng/mL |
| Aldosterone | 360.45 | 9.191475 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 7.35471 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 9.396495 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 34.5627 ng/mL |
| Folate (Folic Acid) | 441.4 | 11.2557 ng/mL |
| Melatonin | 232.28 | 5.92314 ng/mL |
| Thyroxine (T4) | 776.87 | 19.810185 ng/mL |
| Triiodothyronine (T3) | 651.01 | 16.600755 ng/mL |
| Androstenedione | 286.41 | 7.303455 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.
Molar units like nmol/L and mass units like ng/mL aren’t interchangeable without a conversion factor. For Vitamin D, that factor comes from its molecular weight – here’s how it plays out for 25.5 nmol/L.
-> Multiply 25.5 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 25.5 × 400.64 = 10216.32.
-> Divide that result by 1000 to convert nanomoles to nanograms: 10216.32 ÷ 1000 = 10.21632.
That gives a final answer of 10.21632 ng/mL for 25.5 nmol/L – the calculator above does this instantly for any other number.
