How this calculator works
This page reports the conventional mixed-unit T/E2 number: testosterone in ng/dL divided by estradiol in pg/mL. It is not a dimensionless same-unit mass ratio. Input units are normalized before calculation using Mayo Clinic Laboratories conversion factors. A ratio does not establish a diagnosis, a hormonal balance target or a reason to start or adjust treatment. Timing, assay method and individual clinical circumstances affect interpretation. The result is an estimate for information only and is not medical advice.
Formula
Conventional T/E2 = testosterone ng/dL / estradiol pg/mL; same-unit mass ratio would be 10 times this number. Estradiol pg/mL × 3.671 = pmol/L. Testosterone ng/dL × 0.0347 = nmol/L.
Worked example
Testosterone 500 ng/dL and estradiol 100 pg/mL give the conventional mixed-unit number 5. The same values are 17.35 nmol/L and 367.1 pmol/L.
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Frequently asked questions
Does the ratio have a universal normal range?
No. This tool does not assign a diagnostic threshold or treatment target.
Why does unit convention matter?
Dividing unconverted laboratory numbers can change the ratio by a factor of ten or a thousand.
Can I use this to adjust hormones?
No. Treatment decisions require the complete clinical context and an appropriate clinician.