20 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 - 20 nM and 20 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 20 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 8.0128 ng/mL |
| Testosterone | 288.42 | 5.7684 ng/mL |
| Estradiol (E2) | 272.38 | 5.4476 ng/mL |
| Cortisol | 362.46 | 7.2492 ng/mL |
| Progesterone | 314.47 | 6.2894 ng/mL |
| Vitamin A (Retinol) | 286.45 | 5.729 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 8.6142 ng/mL |
| Aldosterone | 360.45 | 7.209 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 5.7684 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 7.3698 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 27.108 ng/mL |
| Folate (Folic Acid) | 441.4 | 8.828 ng/mL |
| Melatonin | 232.28 | 4.6456 ng/mL |
| Thyroxine (T4) | 776.87 | 15.5374 ng/mL |
| Triiodothyronine (T3) | 651.01 | 13.0202 ng/mL |
| Androstenedione | 286.41 | 5.7282 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.
Lab results for Vitamin D sometimes come back in nmol/L instead of ng/mL, which makes it hard to compare against a ng/mL reference range. Here’s how 20 nmol/L becomes ng/mL.
-> Multiply 20 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 20 × 400.64 = 8012.8.
-> Divide that result by 1000 to convert nanomoles to nanograms: 8012.8 ÷ 1000 = 8.0128.
That gives a final answer of 8.0128 ng/mL for 20 nmol/L – the calculator above does this instantly for any other number.
