The normal range of testosterone levels in healthy adult males is between 280 to 1,100 nanograms per deciliter (ng/dL), reports the University of Rochester Medical Center. It’s important to determine if a low testosterone level is due to normal aging or if it’s due to a disorder.owever, women create lower levels and are more sensitive to androgens than men. Testosterone levels in women vary. According to the University of Rochester Medical Center, normal measurements range from 15 to 70 ng/dL. A woman’s estrogen levels drop after she enters menopause.