Free T4: ng/dL to pmol/L
Convert Free T4 between ng/dL and pmol/L — Free T4 (FT4) is reported in ng/dL in the US and pmol/L elsewhere. Type in either box to convert both ways.
Free T4 conversion table (ng/dL to pmol/L)
| Free T4 (ng/dL) | Free T4 (pmol/L) |
|---|---|
| 0.7 ng/dL | 9.01054 pmol/L |
| 0.8 ng/dL | 10.2978 pmol/L |
| 1 ng/dL | 12.8722 pmol/L |
| 1.2 ng/dL | 15.4466 pmol/L |
| 1.5 ng/dL | 19.3083 pmol/L |
| 1.8 ng/dL | 23.17 pmol/L |
How to convert Free T4 from ng/dL to pmol/L
To convert Free T4, multiply ng/dL by 12.87 — free thyroxine has a molar mass of 776.87 g/mol. For example, 1 ng/dL equals 12.8722 pmol/L. The converter above runs the exact factor at full precision and updates as you type; the swap button flips the direction.
Frequently asked questions
How do you convert Free T4 from ng/dL to pmol/L?
Multiply ng/dL by 12.87 — free thyroxine has a molar mass of 776.87 g/mol. For example, 1 ng/dL is 12.8722 pmol/L. The converter above does this instantly and works both ways — type a value in either box. It uses the exact factor at full precision, so the result matches published clinical conversions.
What is a normal Free T4 level?
Free T4 is typically about 0.8–1.8 ng/dL (10–23 pmol/L); reference ranges are assay-specific. These are general adult figures only — the reference interval on your own lab report is what applies to you, and it can differ by lab, method, age and sex. The conversion table above runs from 0.7 to 1.8 ng/dL, or 9.01054 to 23.17 pmol/L, so a range quoted in either system can be lined up against your own figure.
Why is Free T4 reported in different units?
Free T4 (FT4) is reported in ng/dL in the US and pmol/L elsewhere. The two systems describe the same measurement, so a value converts exactly from one to the other with no loss of meaning — only the units and the number change. That is why guidelines, journals and lab reports from different countries quote different numbers for the same Free T4 result. The two boxes above are labelled ng/dL and pmol/L, so you can read a value in whichever system your own report uses.
Is this Free T4 converter accurate and free?
Yes — this Free T4 converter is both accurate and free. It applies the standard, published conversion factor at full double precision in your browser, with nothing uploaded or stored, and there is no sign-up or usage limit. It converts units only and does not interpret or diagnose results.
This is a unit-conversion reference tool, not a diagnosis or medical advice. Reference intervals are general adult guides that vary by laboratory, method and individual — always read your result against the range printed on your own report and discuss it with a qualified healthcare professional.
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