Total T4 (thyroxine): µg/dL to nmol/L converter
Convert total t4 (thyroxine) between µg/dL and nmol/L instantly - type a value in either box. With the exact formula, a reference table and what it means for your result.
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Formula: nmol/L = µg/dL × 12.9
Reverse: µg/dL = nmol/L × 0.077519
Conversion factor source: Labcorp, SI Unit Conversion Table
Common values
| µg/dL | nmol/L |
|---|---|
| 4 | 52 |
| 6 | 77 |
| 8 | 103 |
| 10 | 129 |
| 12 | 155 |
| 14 | 181 |
Frequently asked questions
What is the formula to convert total t4 (thyroxine)?
nmol/L = µg/dL × 12.9. To go the other way, divide instead of multiply.
How do I convert nmol/L to µg/dL?
µg/dL = nmol/L × 0.077519. It is the same conversion in reverse - type a value in the nmol/L field above and the µg/dL value appears instantly.
Which unit does my country use for total t4 (thyroxine)?
The US typically reports µg/dL; most of Europe, Russia and Israel use nmol/L. Your lab prints its unit next to the value.
Does converting change what my result means?
No - it's the same value in a different unit. Always compare it to your own lab's reference range and discuss with your doctor.
Reading a full lab report? See the Total T4 (thyroxine) marker guide or upload your report - Mediora explains every value.
Upload a test - freeConversion is provided for convenience - always read your result against your own lab's units and reference range, with your doctor.