Testosterone Assessment Tool Free & Bioavailable Testosterone Calculator Estimate your free and bioavailable testosterone using values from your recent lab results. Private & Secure Your information is not stored or shared. Free Testosterone Calculator Enter your albumin, SHBG, and total testosterone values below. Please use the units displayed beside each field. CLINICAL CALCULATOR Free & Bioavailable Testosterone Estimate free and bioavailable testosterone using total testosterone, SHBG, and albumin. Albumin g/dL SHBG nmol/L Total Testosterone Calculate Results Reset Important Information This calculator provides an estimate for informational and educational purposes only. Results should not be used to diagnose a condition, determine treatment, or replace evaluation by a qualified healthcare professional. Calculated results may be unreliable when other steroids significantly interfere with SHBG binding, including during pregnancy or certain hormone treatments.