The values for testosterone that we accept are: <br> <br> Normal for a young man: <br> 317 ng/dL total testosterone<br> 7.34 ng/dL free testosterone<br> 86-231 ng/dL bioavailable testosterone<br> <br> These are different amounts based on what is being measured. As men age, their free testosterone and bioavailable testosterone may decline as their total testosterone stays the same or goes up.