Free & Bioavailable Testosterone Calculator

Albumin*:
Units: g/L g/dL

SHBG:
Units: nmol/L

Testosterone:
Units: ng/dL ng/mL nmol/dL nmol/mL nmol/L

Free Testosterone:

Bioavailable Testosterone:

Per the British Society of Sexual Medicine (BSSM) guidelines on the role of androgens, “A free testosterone level below 0.225nmol/L provides supportive evidence for treatment with testosterone in the presence of appropriate symptoms. Please see the BSSM guidance for details."

* The albumin is preset at 43g/L. If you are aware of the patient’s albumin, please adjust appropriately. If not, this preset should give you a relatively accurate estimate of free testosterone as long as the patient does not have significant ill health which may alter albumin. Evidence from J Clin Endocrinol Metab 84:3666-3672, 1999 – A critical evaluation of simple methods for the estimation of free testosterone in serum.