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Reverse T3 (rT3)

Hormones

Reverse T3 (rT3)

Also known as: rT3, Reverse Triiodothyronine

COMMON RANGE

10 – 24

ng/dL

6.1

28.9

M

Mayo Clinic Laboratories

Adult

See all sources ↓

CONVERT & COMPARE

ng/dL

=

261

pmol/L

Reference ranges by source

Published adult intervals: 4, from 4 named sources, shown in ng/dL.

SOURCE

SEX

AGE

RANGE

VISUAL

CITE

A

ARUP Laboratories

All

≥18y

9 – 27 ng/dL

M

Mayo Clinic Laboratories

All

≥18y

10 – 24 ng/dL

L

Labcorp

All

≥18y

9.2 – 24.1 ng/dL

Q

Quest Diagnostics

All

≥18y

8 – 25 ng/dL

A

ARUP Laboratories

All · ≥18y

9 – 27 ng/dL

M

Mayo Clinic Laboratories

All · ≥18y

10 – 24 ng/dL

L

Labcorp

All · ≥18y

9.2 – 24.1 ng/dL

Q

Quest Diagnostics

All · ≥18y

8 – 25 ng/dL

Related biomarkers

More tests in the hormones category.

Thyroid Stimulating Hormone (TSH)

Free T4 (Thyroxine)

Free T3 (Triiodothyronine)

Total T4 (Thyroxine)

Total T3 (Triiodothyronine)

Thyroid Peroxidase Antibodies (TPO)

Sources

ARUP Laboratories

Mayo Clinic Laboratories

Quest Diagnostics

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.

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