Bilirubin µmol/L to mg/dL Converter
Instantly convert bilirubin levels between micromoles per litre (µmol/L) and milligrams per decilitre (mg/dL). Precise, free, and easy-to-use medical measurement tool.
Convert Bilirubin Measurements
Enter your lab result below to get instant, accurate conversions. Perfect for interpreting liver function tests, newborn jaundice screening, and international medical records.
Measurement Converter
Type in either field to convert instantly in both directions
Standard SI unit (UK, Canada, Australia)
Standard US customary unit
Alternative mass concentration
SI unit scaled by 1000
Conversion Result
Exact measurement breakdown and formula
Bilirubin Level Interpretation
General reference ranges for total bilirubin in adults. Always consult your specific laboratory’s reference range, as methodologies may vary slightly.
| µmol/L | mg/dL | Clinical Significance (Adults) |
|---|---|---|
| < 21 | < 1.2 | Normal range |
| 21 – 51 | 1.2 – 3.0 | Mild elevation (subclinical jaundice) |
| 51 – 171 | 3.0 – 10.0 | Moderate elevation (visible jaundice) |
| 171 – 340 | 10.0 – 20.0 | Severe elevation (requires medical evaluation) |
| > 340 | > 20.0 | Critical elevation (urgent medical attention) |
Bilirubin Conversion FAQ
Everything you need to know about converting and understanding bilirubin measurements.
The conversion factor for bilirubin is 17.1. To convert mg/dL to µmol/L, multiply by 17.1. To convert µmol/L to mg/dL, divide by 17.1 (or multiply by 0.05848). This factor is derived from the molecular weight of bilirubin (approximately 584.66 g/mol).
In healthy adults, normal total bilirubin levels are typically less than 1.2 mg/dL, which is equivalent to less than 21 µmol/L. Slight variations may exist depending on the specific laboratory’s testing methods and reference ranges.
The United States primarily uses milligrams per decilitre (mg/dL) for blood tests. Most other countries, including the UK, Canada, Australia, and much of Europe, use the International System of Units (SI) measurement: micromoles per litre (µmol/L). This converter helps bridge the gap between these regional medical standards.
Yes, the mathematical conversion (1 mg/dL = 17.1 µmol/L) is exactly the same for newborns. However, ‘normal’ ranges for newborns are much higher than for adults and depend heavily on the baby’s age in hours and whether they were born prematurely. Always use a newborn-specific bilirubin nomogram and consult a pediatrician for interpretation.