Calculators › Vitamin D (25-OH)

Vitamin D (25-OH): ng/mL to nmol/L

1 ng/mL = 2.496 nmol/L

Reference only. These conversions are arithmetic, not medical advice. Reference ranges differ between laboratories, and results should be interpreted by a clinician alongside the lab's own reported units and ranges.

Conversion table

Going the other way, 1 nmol/L = 0.40064 ng/mL.

Why this conversion needs the substance

ng/mL measures mass; nmol/L measures amount of substance. Converting between them needs the molar mass of the thing being measured — for vitamin d (25-oh) that is 400.64 g/mol. That is why a generic converter can't do it, and why every analyte has a different factor.

Jotal works this out from molar mass rather than a stored factor, so write vitamin d 50 ng/mL in nmol/L and it answers 124.8003 nmol/L. Leave the substance out and it deliberately returns nothing rather than guessing.

Other lab values

• Glucose (mg/dL to mmol/L)
• Cholesterol (mg/dL to mmol/L)
• Triglycerides (mg/dL to mmol/L)
• Creatinine (mg/dL to µmol/L)
• Bilirubin (mg/dL to µmol/L)
• Urea (BUN) (mg/dL to mmol/L)
• Uric acid (mg/dL to µmol/L)
• Calcium (mg/dL to mmol/L)
• Vitamin B12 (pg/mL to pmol/L)
• Hemoglobin (g/dL to mmol/L)
• Albumin (g/dL to µmol/L)
• Blood alcohol (ethanol) (mg/dL to mmol/L)
• Lactate (mg/dL to mmol/L)
• Testosterone (ng/dL to nmol/L)
• Estradiol (estrogen) (pg/mL to pmol/L)
• Progesterone (ng/mL to nmol/L)
• Cortisol (µg/dL to nmol/L)