225 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 - 225 nM and 225 nmol/L mean exactly the same thing.
Common nmol/L Values
Same value, converted for every molecule
| Molecule | MW (g/mol) | 225 nmol/L in ng/mL |
|---|---|---|
| Vitamin D (25-Hydroxyvitamin D) | 400.64 | 90.144 ng/mL |
| Testosterone | 288.42 | 64.8945 ng/mL |
| Estradiol (E2) | 272.38 | 61.2855 ng/mL |
| Cortisol | 362.46 | 81.5535 ng/mL |
| Progesterone | 314.47 | 70.75575 ng/mL |
| Vitamin A (Retinol) | 286.45 | 64.45125 ng/mL |
| Vitamin E (Alpha-Tocopherol) | 430.71 | 96.90975 ng/mL |
| Aldosterone | 360.45 | 81.10125 ng/mL |
| Dehydroepiandrosterone (DHEA) | 288.42 | 64.8945 ng/mL |
| DHEA-Sulfate (DHEA-S) | 368.49 | 82.91025 ng/mL |
| Vitamin B12 (Cobalamin) | 1355.4 | 304.965 ng/mL |
| Folate (Folic Acid) | 441.4 | 99.315 ng/mL |
| Melatonin | 232.28 | 52.263 ng/mL |
| Thyroxine (T4) | 776.87 | 174.79575 ng/mL |
| Triiodothyronine (T3) | 651.01 | 146.47725 ng/mL |
| Androstenedione | 286.41 | 64.44225 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 225 nmol/L becomes ng/mL.
-> Multiply 225 nmol/L by the molecular weight of Vitamin D, 400.64 g/mol: 225 × 400.64 = 90144.
-> Divide that result by 1000 to convert nanomoles to nanograms: 90144 ÷ 1000 = 90.144.
225 nmol/L converts to 90.144 ng/mL. The calculator above will do the same math automatically for any value you enter.
