1.9 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 - 1.9 nM and 1.9 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 1.9 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 0.761216 ng/mL |
| Testosterone | 288.42 | 0.547998 ng/mL |
| Estradiol (E2) | 272.38 | 0.517522 ng/mL |
| Cortisol | 362.46 | 0.688674 ng/mL |
| Progesterone | 314.47 | 0.597493 ng/mL |
| Vitamin A (Retinol) | 286.45 | 0.544255 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 0.818349 ng/mL |
| Aldosterone | 360.45 | 0.684855 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 0.547998 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 0.700131 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 2.57526 ng/mL |
| Folate (Folic Acid) | 441.4 | 0.83866 ng/mL |
| Melatonin | 232.28 | 0.441332 ng/mL |
| Thyroxine (T4) | 776.87 | 1.476053 ng/mL |
| Triiodothyronine (T3) | 651.01 | 1.236919 ng/mL |
| Androstenedione | 286.41 | 0.544179 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 1.9 nmol/L becomes ng/mL.
-> Multiply 1.9 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 1.9 × 400.64 = 761.216.
-> Divide that result by 1000 to convert nanomoles to nanograms: 761.216 ÷ 1000 = 0.761216.
That’s 0.761216 ng/mL for 1.9 nmol/L. The calculator above updates instantly if you want to try another value.
