Blood
Bilirubin (Total)
Bilirubin is a pigment produced as older red blood cells break down. A blood test helps a healthcare provider assess how the liver and related processes are working.
Also known as: TBil, Total Bili
CONVERT & COMPARE
mg/dL
=
10.3
µmol/L
=
10.3
umol/L
=
10.3
mcmol/L
Reference ranges by source
Published adult intervals: 12, from 9 named sources, shown in mg/dL.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
U
UK Pathology Harmony
All
≥18y
0.1 – 1.2 mg/dL
J
JSCC / JAMT Japan
All
≥18y
0.4 – 1.5 mg/dL
T
Turkey Nationwide Reference Intervals
Male
≥18y
0.22 – 1.31 mg/dL
T
Turkey Nationwide Reference Intervals
Female
≥18y
0.16 – 0.93 mg/dL
U
UK Pathology Harmony
All · ≥18y
0.1 – 1.2 mg/dL
J
JSCC / JAMT Japan
All · ≥18y
0.4 – 1.5 mg/dL
T
Turkey Nationwide Reference Intervals
Male · ≥18y
0.22 – 1.31 mg/dL
T
Turkey Nationwide Reference Intervals
Female · ≥18y
0.16 – 0.93 mg/dL
Ages 0–17 (CALIPER)
7 age- and sex-stratified entries from the Canadian Laboratory Initiative on Pediatric Reference Intervals.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
Reading total bilirubin on your report
Check that the result is labeled total bilirubin. Direct (conjugated) bilirubin is a different measurement with a different interval; do not use its reference range for a total result.
Match the unit on your report to the unit shown in the table. Published ranges can differ between laboratories and populations, so the interval supplied with your own result remains the relevant comparison.
Newborn bilirubin needs separate clinical assessment, including the baby’s age and how quickly the value is changing. An adult interval on this page cannot be used to assess newborn jaundice.
A high value may have several explanations and a low value is often not concerning. The result alone does not establish the cause; your provider may consider other liver tests and your health history.
Explanation prepared by Joelis labs, UAB · Sources checked 2026-09-22
MedlinePlus: bilirubin blood test ↗
MedlinePlus: bilirubin measurements and newborn context ↗
MedlinePlus: understanding lab results ↗
Track your bilirubin (total) in MyBloodTest
Save reviewed lab results and follow their history. Scanning requires sign-in and has plan-specific limits.
Open the web app
iOS · Android · Web
Related biomarkers
More tests in the blood category.
Sources
M
Mayo Clinic Laboratories
L
Labcorp
Q
Quest Diagnostics
R
RCPA / AACB Australasian Harmonised Reference Intervals
N
Nordic Reference Interval Project
U
UK Pathology Harmony
J
JSCC / JAMT Japan
#
NUMBER: Dutch Reference Value Study
T
Turkey Nationwide Reference Intervals
C
CALIPER: Canadian Pediatric Reference Intervals
Last updated 2026-05-02
This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.