AndroScore: Free Testosterone Calculator

Free and bioavailable testosterone from total testosterone, SHBG and albumin (ISSAM / Vermeulen method). Works fully offline.

Calculate free and bioavailable testosterone in seconds. Enter total testosterone (ng/dL or nmol/L) and SHBG; albumin and age are optional. AndroScore uses the ISSAM (University Hospital Ghent) calculator based on Vermeulen et al. 1999, the same engine as the AndroScore app. • Free testosterone in ng/dL, pg/mL, nmol/L and % • Bioavailable testosterone • Clinical color band: markedly low, low, grey zone, normal • Age adjusted grey zone • English and Turkish • Works offline. No permissions, no data collection. Built by Niyazi Umut Özdemir, MD, Urologist. For a full assessment with symptoms, a single AndroScore and a clinical report, get the AndroScore app on the App Store and Google Play. For information only; does not replace a medical diagnosis.