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Complement C4
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Complement C4
COMMON RANGE
14 – 40
mg/dL
3.7
43.3
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
CONVERT & COMPARE
mg/dL
=
0.27
g/L
Reference ranges across 10+ sources
Adult reference ranges from 4 entries across 4 trusted sources, shown in mg/dL. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18
12 – 38 mg/dL
↗
M
Mayo Clinic Laboratories
All
≥18
14 – 40 mg/dL
↗
Q
Quest Diagnostics
All
≥18
12 – 38 mg/dL
↗
L
Labcorp
All
≥18
10 – 40 mg/dL
↗
A
ARUP Laboratories
All · ≥18
↗
12 – 38 mg/dL
M
Mayo Clinic Laboratories
All · ≥18
↗
14 – 40 mg/dL
Q
Quest Diagnostics
All · ≥18
↗
12 – 38 mg/dL
L
Labcorp
All · ≥18
↗
10 – 40 mg/dL
Ages 0–17 (CALIPER)
PEDIATRIC
2 age- and sex-stratified entries from the Canadian Laboratory Initiative on Pediatric Reference Intervals.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
C
CALIPER — Canadian Pediatric Reference Intervals
All
0–0.04
7 – 30 mg/dL
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
1–19
13 – 37 mg/dL
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All · 0–0.04
↗
7 – 30 mg/dL
C
CALIPER — Canadian Pediatric Reference Intervals
All · 1–19
↗
13 – 37 mg/dL
Related biomarkers
Often tested alongside complement c4 or part of the same panel.
Lead (Pb)
Other
Mercury (Hg)
Other
Arsenic (As)
Other
Prostate Specific Antigen (PSA)
Other
Free PSA
Other
CA-125
Other
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
L
Labcorp
C
CALIPER — Canadian Pediatric Reference Intervals
Last updated 2026-05-02
This page aggregates publicly available reference data and clinical information from Mayo Clinic Laboratories and other sources. For general wellness information only — not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
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