Medical Calculator – SonDoctor.com
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Thyroid Hormone Unit Converter
※ Automatically converts when values are entered.
※ Unit Conversion Reference
TSH : 1 mIU/L = 1 μIU/mL
Total T4 : 1 nmol/L = 0.0775 μg/dL
Total T4 : 1 μg/dL = 12.9 nmol/L
Free T4 : 1 pmol/L = 0.0775 ng/dL
Free T4 : 1 ng/dL = 12.9 pmol/L
T3 : 1 nmol/L = 64.9 ng/dL
T3 : 1 ng/dL = 0.0154 nmol/L
| Test Name | Standard Reference Range | Optimal Reference Range |
|---|---|---|
| TSH | 0.4 – 5.5 µIU/mL | 0.5 – 2 µIU/mL (0.5 – 2.5 µIU/mL in elderly) |
| Free T4 | 9 – 23 pmol/L | 15 – 23 pmol/L |
| Free T3 | 3 – 7 pmol/L | 5 – 7 pmol/L |
| Reverse T3 | 11 – 21 ng/dl | 11 – 18 ng/dl |
| TPO Antibodies | <35 IU/mL | <2 IU/mL |
| TG Antibodies | <35 IU/mL | <2 IU/mL |
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