Calculators

Free Testosterone Calculator

Total testosterone can look normal while free testosterone still comes in low enough to explain symptoms. This calculator gives you a cleaner estimate using SHBG and albumin instead of total T alone.

Free Testosterone Calculator

Estimate your free testosterone from total testosterone, SHBG, and albumin using the Vermeulen equation, the same model many clinical labs use for calculated free T.

Total Testosterone (ng/dL)SHBG (nmol/L)Albumin (g/dL)

Educational only, not a diagnosis. Formula based on Vermeulen et al. 1999.