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Retinol (Vitamin A) Unit Converter
Retinol (Vitamin A) is a fat-soluble vitamin essential for vision, immune function, and cell growth. It circulates in the blood primarily bound to retinol-binding protein.
Clinically, serum retinol levels are measured to diagnose Vitamin A Deficiency (often manifesting as night blindness or xerophthalmia) or toxicity (Hypervitaminosis A). This converter facilitates switching between the standard US mass unit (μg/dL) and the international SI unit (μmol/L).
SI Units
RecommendedMicromoles per liter (International Standard).
Mass Units
Clinical Context
Reference Ranges (Adults):
• Normal: 20 – 80 μg/dL (0.70 – 2.80 μmol/L).
• Deficiency: < 20 μg/dL (< 0.70 μmol/L).
• Severe Deficiency: < 10 μg/dL (< 0.35 μmol/L).
Conversion Logic:
Molecular Weight of Retinol: 286.45 g/mol.
1 μg/dL ≈ 0.03491 μmol/L.
1 μmol/L ≈ 28.645 μg/dL.
Clinical References
How to Use This Converter
Follow these steps to normalize Retinol values.
Enter Values
Input your laboratory results into the corresponding unit field (e.g., μg/dL).
Automatic Conversion
The calculator converts between mass units and the SI molar unit (μmol/L).
Check Ranges
Compare the result to the reference ranges provided to assess for deficiency or toxicity.
Reset
Use the Clear button to reset all fields.
Frequently Asked Questions
No. Retinol is preformed Vitamin A found in animal products. Beta-carotene is a provitamin found in plants that the body converts to retinol.
It is the standard conventional unit in the US. However, many international journals require SI units (μmol/L).