Free Estradiol Estimator

Note: The results will be low if you are taking Boron. It will also be low if your T is a significant proportion of your SHBG.

To use, enter your E2 and T in SI or US units and hit the calculate button.

The equations used come from here:

They are from the 1st set by Vermeulen et al

Estradiol (E2) pmol/L Estradiol (E2) pg/mL
Testosterone (T) nmol/L Testosterone (T) ng/dL
SHBG nmol/L

Free E2 pmol/L Free E2 pg/mL
Free T pmol/L Free T ng/dL

For any issues, contact u/Ally-SR on Reddit