Free androgen index

Enter total testosterone and SHBG from your lab report. FAI is defined on molar concentrations, so the testosterone is converted to nmol/L before dividing.

With Total testosterone 1000 ng/dL, SHBG 15 nmol/L: Free androgen index 231.1; Total testosterone 34.67 nmol/L; SHBG 15 nmol/L.

FAI is defined on molar concentrations, so the total testosterone above is converted to nmol/L before dividing. SHBG has no molecular formula (it is a protein), so it is only ever reported in nmol/L.

About the inputs: Total testosterone, SHBG