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Bilirubin Conversion Formula:
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Bilirubin is a yellow pigment formed during the normal breakdown of red blood cells. It is processed by the liver and excreted in bile. Elevated bilirubin levels can indicate liver dysfunction, bile duct obstruction, or hemolytic disorders.
The calculator uses the conversion formula:
Where:
Explanation: This conversion allows healthcare professionals to translate bilirubin values between the metric (mmol/L) and conventional (mg/dL) measurement systems used in different regions and medical contexts.
Details: Bilirubin measurement is crucial for diagnosing and monitoring liver diseases such as hepatitis, cirrhosis, and biliary obstruction. It's also essential in evaluating neonatal jaundice and hemolytic conditions.
Tips: Enter bilirubin value in mmol/L. The value must be a positive number. The calculator will instantly convert it to mg/dL using the standard conversion factor of 58.5.
Q1: Why is the conversion factor 58.5 for bilirubin?
A: The factor 58.5 comes from the molecular weight of bilirubin (585 g/mol) divided by 10, as 1 mmol/L = (molecular weight/10) mg/dL.
Q2: What are normal bilirubin levels?
A: Normal total bilirubin is typically 0.1-1.0 mg/dL (1.7-17.1 μmol/L). Levels above 2.0 mg/dL may indicate jaundice.
Q3: What's the difference between direct and indirect bilirubin?
A: Indirect (unconjugated) bilirubin is water-insoluble and bound to albumin. Direct (conjugated) bilirubin is water-soluble and processed by the liver.
Q4: When should bilirubin be measured?
A: When jaundice is observed, when monitoring liver disease, in newborns with suspected jaundice, or when evaluating hemolytic disorders.
Q5: Are there different conversion factors for different substances?
A: Yes, each substance has its own conversion factor based on its molecular weight. Always use the correct factor for accurate conversions.