Thyroid Function Interpreter
Thyroid Function Interpreter
TSH · Free T4 · Free T3 Pattern Analysis · ATA/ETA Guidelines · India-specific ranges
Enter your thyroid test results
mIU/L (normal: 0.4 – 4.0)
Required
pmol/L (normal: 12 – 22) or ng/dL (0.93 – 1.70)
pmol/L (normal: 3.5 – 6.5) or pg/mL (2.3 – 4.2)
Units & patient context
pmol/L
ng/dL
pmol/L
pg/mL
Female
Male
Clinical context — important for interpretation
ⓘ Indian reference ranges: TSH 0.4–4.0 mIU/L. Free T4 12–22 pmol/L (0.93–1.70 ng/dL). Free T3 3.5–6.5 pmol/L (2.3–4.2 pg/mL). Note: Reference ranges vary between laboratories. Always compare with the reference range printed on your own report. TSH alone is the most reliable single screening test.
| Thyroid State | TSH | Free T4 | Free T3 |
|---|---|---|---|
| Euthyroid (Normal) | 0.4 – 4.0 mIU/L | Normal | Normal |
| Subclinical Hypothyroid | > 4.0, < 10 | Normal | Normal |
| Overt Hypothyroid | ≥ 10 | Low | Low or normal |
| Subclinical Hyperthyroid | < 0.4 | Normal | Normal |
| Overt Hyperthyroid | < 0.1 | High | High |
| T3 Toxicosis | < 0.1 | Normal | High |
| Central Hypothyroid | Low or normal | Low | Low or normal |
Please enter a TSH value to generate the interpretation.
—
mIU/L TSH
—
—
TSH spectrum — where your result sits
Overt HyperSub-HyperNormal (0.4–4.0)Sub-Hypo (4–10)Overt Hypo (>10)
TSH
—
Ref: 0.4–4.0
Free T4
—
Ref: 12–22 pmol/L
Free T3
—
Ref: 3.5–6.5 pmol/L
Thyroid state
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Pattern interpretation
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Treatment & medication guidance
Monitoring schedule & next steps
Special consideration
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Clinical flags
Opens WhatsApp — no commitment required
ⓘ For educational purposes only. Not a substitute for physician judgment.
Reference ranges based on ATA 2012/2019 guidelines, ETA 2013/2022 guidelines, and ICMR/API recommendations for Indian laboratories.
TSH reference ranges may vary between laboratories and assay methods — always compare with the ranges printed on your own report.
Subclinical thyroid dysfunction requires clinical correlation before treatment decisions are made.
Interpretation changes significantly in pregnancy, post-partum, severe illness, and with certain drugs.
