Free T3: pg/mL to pmol/L
Convert Free T3 between pg/mL and pmol/L — Free T3 (FT3) is reported in pg/mL in the US and pmol/L elsewhere. Type in either box to convert both ways.
Free T3 conversion table (pg/mL to pmol/L)
| Free T3 (pg/mL) | Free T3 (pmol/L) |
|---|---|
| 2 pg/mL | 3.07224 pmol/L |
| 2.3 pg/mL | 3.53308 pmol/L |
| 3 pg/mL | 4.60836 pmol/L |
| 3.5 pg/mL | 5.37642 pmol/L |
| 4 pg/mL | 6.14448 pmol/L |
| 4.4 pg/mL | 6.75893 pmol/L |
How to convert Free T3 from pg/mL to pmol/L
To convert Free T3, multiply pg/mL by 1.536 — free triiodothyronine has a molar mass of 650.98 g/mol. For example, 1 pg/mL equals 1.53612 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 T3 from pg/mL to pmol/L?
Multiply pg/mL by 1.536 — free triiodothyronine has a molar mass of 650.98 g/mol. For example, 1 pg/mL is 1.53612 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 T3 level?
Free T3 is typically about 2.3–4.2 pg/mL (3.5–6.5 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 2 to 4.4 pg/mL, or 3.07224 to 6.75893 pmol/L, so a range quoted in either system can be lined up against your own figure.
Why is Free T3 reported in different units?
Free T3 (FT3) is reported in pg/mL 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 T3 result. The two boxes above are labelled pg/mL and pmol/L, so you can read a value in whichever system your own report uses.
Is this Free T3 converter accurate and free?
Yes — this Free T3 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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