Free T3 to free T4 ratio
Enter free T3 and free T4 from your lab report. Most panels print them in different units, so both are converted to pmol/L before dividing.
With Free T3 2 pg/mL, Free T4 0.8 ng/dL: Free T3 : free T4 0.298 both as pmol/L; As printed (pg/mL per ng/dL) 2.5; Free T3 3.07 pmol/L; Free T4 10.3 pmol/L.
A ratio has no meaning without its units: the same two results give a different number depending on which unit each is expressed in. The headline here is the conventional form, and the unit-matched forms are shown beside it so the three can be told apart.