23 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 - 23 nM and 23 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 23 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 9.21472 ng/mL |
| Testosterone | 288.42 | 6.63366 ng/mL |
| Estradiol (E2) | 272.38 | 6.26474 ng/mL |
| Cortisol | 362.46 | 8.33658 ng/mL |
| Progesterone | 314.47 | 7.23281 ng/mL |
| Vitamin A (Retinol) | 286.45 | 6.58835 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 9.90633 ng/mL |
| Aldosterone | 360.45 | 8.29035 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 6.63366 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 8.47527 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 31.1742 ng/mL |
| Folate (Folic Acid) | 441.4 | 10.1522 ng/mL |
| Melatonin | 232.28 | 5.34244 ng/mL |
| Thyroxine (T4) | 776.87 | 17.86801 ng/mL |
| Triiodothyronine (T3) | 651.01 | 14.97323 ng/mL |
| Androstenedione | 286.41 | 6.58743 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.
Some labs report Vitamin D in nmol/L, others in ng/mL – and the two aren’t the same number. This walks through converting 23 nmol/L step by step.
Step 1: Multiply 23 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 23 × 400.64 = 9214.72.
Step 2: Divide that result by 1000 to convert nanomoles to nanograms: 9214.72 ÷ 1000 = 9.21472.
That’s 9.21472 ng/mL for 23 nmol/L. The calculator above updates instantly if you want to try another value.
