Bilirubin Unit Converter (mg/dL ↔ µmol/L)

Convert bilirubin between mg/dL and µmol/L in either direction. Enter a value and the result updates instantly. This page performs unit conversion and cites where the factor and the reference intervals come from; it does not interpret your value.

mg/dL

µmol/L

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The bilirubin conversion factor and where it comes from

Bilirubin is a yellow breakdown product of red blood cells processed by the liver; total bilirubin is reported on a liver panel. Bilirubin is reported in mg/dL on U.S. lab reports and in µmol/L on UK, Canadian, Australian, and most European reports.

The standard conversion factor for bilirubin is 17.1, applied as mg/dL × 17.1 = µmol/L (and µmol/L ÷ 17.1 = mg/dL in reverse). The SI unit for bilirubin is µmol/L (micromoles); with a molecular weight of 584.66 g/mol this gives the widely used factor 17.1. Source: AMA Manual of Style / UK Kidney Association SI conversion table.

Published reference intervals

The intervals below are reproduced from U.S. National Library of Medicine, MedlinePlus: Bilirubin blood test. They are listed here for unit reference only. Whether any value is in range for you depends on your laboratory's own reference range and your clinical context, so read them alongside your report and your healthcare provider, not in place of either.

Category	mg/dL	µmol/L
Typical reference: total bilirubin	0.1-1.2 mg/dL	1.7-20.5 µmol/L
Typical reference: direct bilirubin	Less than 0.3 mg/dL	Less than 5.1 µmol/L

Reference ranges vary by laboratory and assay; the values above are representative adult ranges published by the source.

Pre-computed bilirubin conversions

Dedicated answer pages for the bilirubin values people search for most. Each shows the answer, the math, and a table of nearby values.

mg/dL to µmol/L

1 mg/dL to µmol/L

Common questions

How do I convert bilirubin from mg/dL to µmol/L?

Multiply by 17.1: mg/dL × 17.1 = µmol/L. To go the other way, divide by 17.1 (or multiply by 0.0585).

What is the bilirubin conversion factor?

17.1. The SI unit for bilirubin is µmol/L (micromoles); with a molecular weight of 584.66 g/mol this gives the widely used factor 17.1.

Where is mg/dL used and where is µmol/L used?

Bilirubin is reported in mg/dL on U.S. lab reports and in µmol/L on UK, Canadian, Australian, and most European reports.

Related converters and reference

Full blood test unit converter: 60+ biomarkers, any value, either direction.
nmol/L to mg/dL by substance: the molar-to-mass conversion depends on which substance you measured.
HbA1c to average glucose (eAG) converter.

Medical Disclaimer: This page converts units and cites published reference intervals. It is not a clinical interpretation. Whether any bilirubin value is within range for you depends on your laboratory's reference range, your individual baseline, and clinical context. Discuss specific results with your healthcare provider.

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