Hormonology
FT3
Free Triiodothyronine
Free T3 Unit Converter
Convert Free T3 between pmol/L, pg/mL, and ng/dL.
Published on: 2026-06-06 ·
Last updated: 2026-06-06
Enter Free T3 value
You can enter a value in any supported unit.
Please enter a valid positive number.
What does this converter do?
This tool converts Free T3 values between pmol/L, pg/mL, and ng/dL. The conversion is specific to Free T3 and should not be used for Free T4, TSH, insulin, or any other laboratory analyte.
Supported units
pmol/L · SI unit
pg/mL · common reporting
ng/dL · alternative
Conversion formulas
pg/mL = pmol/L × 0.651
pmol/L = pg/mL × 1.536
ng/dL = pg/mL × 0.1
pg/mL = ng/dL × 10
Example conversion
If Free T3 = 5.0 pmol/L, then Free T3 ≈ 3.26 pg/mL and ≈ 0.326 ng/dL.
Important laboratory note
Free T3 reference ranges vary by laboratory method, assay platform, age, thyroid status, and local reporting standards. This converter only changes units and does not diagnose thyroid disease.