1. What is Bilirubin?

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 or other medical conditions.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( mg/dL \) — Bilirubin measurement in milligrams per deciliter
• \( mmol/L \) — Bilirubin measurement in millimoles per liter
• 58.5 — Molecular weight of bilirubin (g/mol)

Explanation: This formula converts bilirubin measurements from mg/dL (commonly used in the US) to mmol/L (used in most other countries and in scientific literature).

3. Importance of Bilirubin Measurement

Details: Bilirubin levels are crucial for diagnosing and monitoring liver diseases, bile duct obstructions, hemolytic disorders, and neonatal jaundice. Accurate conversion between measurement units is essential for international medical communication and research.

4. Using the Calculator

Tips: Enter bilirubin value in mg/dL. The value must be greater than 0. The calculator will automatically convert it to mmol/L using the standard conversion formula.

5. Frequently Asked Questions (FAQ)

Q1: Why convert bilirubin from mg/dL to mmol/L?
A: Different countries use different measurement systems. Conversion allows for standardized comparison of results across international studies and medical practices.

Q2: What are normal bilirubin levels?
A: Normal total bilirubin levels are typically 0.1-1.0 mg/dL (1.7-17.1 μmol/L). Levels above this range may indicate liver problems or other conditions.

Q3: Is the conversion factor the same for direct and indirect bilirubin?
A: Yes, the molecular weight and conversion factor are the same for both direct (conjugated) and indirect (unconjugated) bilirubin fractions.

Q4: When is bilirubin testing typically performed?
A: Bilirubin tests are performed when liver disease is suspected, to monitor jaundice, in newborns with yellowing skin, or as part of routine liver function panels.

Q5: Are there any limitations to this conversion?
A: The conversion is mathematically precise, but clinical interpretation should always consider the specific clinical context and laboratory reference ranges.