Free testosterone, calculated
Enter total testosterone, SHBG and albumin from your lab report. The Vermeulen equation, with the paper it comes from and the constants it uses shown.
With Total testosterone 500 ng/dL, SHBG 30 nmol/L, Albumin 4.3 g/dL: Free testosterone 108.5 pg/mL; Free fraction 2.17 %; Bioavailable testosterone 263.5 ng/dL; Free testosterone 376.2 pmol/L.
About the inputs: Total testosterone, SHBG, Albumin