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Thyroid Stimulating Hormone (TSH)
Hormones
Thyroid Stimulating Hormone (TSH)
COMMON RANGE
0.3 – 4.2
mIU/L
0
9.16
M
Mayo Clinic Laboratories
Adult
↗
See all sources ↓
CONVERT & COMPARE
mIU/L
=
2.3
µIU/mL
Reference ranges across 10+ sources
Adult reference ranges from 10 entries across 8 trusted sources, shown in mIU/L. Compare side-by-side.
SOURCE
SEX
AGE
RANGE
VISUAL
CITE
A
ARUP Laboratories
All
≥18
0.27 – 4.2 mIU/L
↗
M
Mayo Clinic Laboratories
All
≥18
0.3 – 4.2 mIU/L
↗
Q
Quest Diagnostics
All
≥18
0.4 – 4.5 mIU/L
↗
L
Labcorp
All
≥18
0.45 – 4.5 mIU/L
↗
W
World Health Organization
All
18–50
0.4 – 4 mIU/L
↗
W
World Health Organization
All
50–70
0.4 – 4.5 mIU/L
↗
W
World Health Organization
All
70–121
0.4 – 5.5 mIU/L
↗
R
RCPA / AACB Australasian Harmonised Reference Intervals
All
≥18
0.5 – 4 mIU/L
↗
U
UK Pathology Harmony
All
≥18
0.27 – 4.2 mIU/L
J
JSCC / JAMT Japan
All
≥18
0.61 – 4.23 mIU/L
A
ARUP Laboratories
All · ≥18
↗
0.27 – 4.2 mIU/L
M
Mayo Clinic Laboratories
All · ≥18
↗
0.3 – 4.2 mIU/L
Q
Quest Diagnostics
All · ≥18
↗
0.4 – 4.5 mIU/L
L
Labcorp
All · ≥18
↗
0.45 – 4.5 mIU/L
W
World Health Organization
All · 18–50
↗
0.4 – 4 mIU/L
W
World Health Organization
All · 50–70
↗
0.4 – 4.5 mIU/L
W
World Health Organization
All · 70–121
↗
0.4 – 5.5 mIU/L
R
RCPA / AACB Australasian Harmonised Reference Intervals
All · ≥18
↗
0.5 – 4 mIU/L
U
UK Pathology Harmony
All · ≥18
0.27 – 4.2 mIU/L
J
JSCC / JAMT Japan
All · ≥18
0.61 – 4.23 mIU/L
Ages 0–17 (CALIPER)
PEDIATRIC
4 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
0–2
0.73 – 8.35 mIU/L
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
2–6
0.7 – 5.97 mIU/L
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
6–13
0.6 – 4.84 mIU/L
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All
13–19
0.5 – 4.3 mIU/L
↗
C
CALIPER — Canadian Pediatric Reference Intervals
All · 0–2
↗
0.73 – 8.35 mIU/L
C
CALIPER — Canadian Pediatric Reference Intervals
All · 2–6
↗
0.7 – 5.97 mIU/L
C
CALIPER — Canadian Pediatric Reference Intervals
All · 6–13
↗
0.6 – 4.84 mIU/L
C
CALIPER — Canadian Pediatric Reference Intervals
All · 13–19
↗
0.5 – 4.3 mIU/L
Related biomarkers
Often tested alongside thyroid stimulating hormone (tsh) or part of the same panel.
Free T4 (Thyroxine)
Hormones
Free T3 (Triiodothyronine)
Hormones
Total T4 (Thyroxine)
Hormones
Total T3 (Triiodothyronine)
Hormones
Reverse T3 (rT3)
Hormones
Thyroid Peroxidase Antibodies (TPO)
Hormones
Sources
A
ARUP Laboratories
M
Mayo Clinic Laboratories
Q
Quest Diagnostics
L
Labcorp
W
World Health Organization
R
RCPA / AACB Australasian Harmonised Reference Intervals
U
UK Pathology Harmony
J
JSCC / JAMT Japan
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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