Where does your testosterone rank for your age?

It depends on your age, and on whose table you use. Travison's harmonised data put healthy non-obese men aged 19 to 39 at 264 to 916 ng/dL, with a median of 531. The calculator's own bands put the median at about 612 ng/dL for 18 to 25, sliding to 440 at 76 and over, so a 530 reading is the median at 50 but about the 33rd percentile at 25.

Yes. Testosterone runs on a daily cycle and peaks between 7am and 10am, and an afternoon reading can come in 20 to 25% below the morning figure. The Endocrine Society recommends a morning, fasting draw for diagnosis. If your only result is an afternoon one, the percentile here will understate you, which is what the optional draw-time field is for.

Total testosterone counts everything in the blood, including the part bound to sex hormone binding globulin (SHBG) and to albumin. Free testosterone is the unbound fraction that's biologically active, typically 1 to 3% of the total. Clinicians make most decisions on total, which is also what this calculator ranks, though free or bioavailable testosterone tells you more when SHBG is abnormal.

Because the number and the symptoms are only loosely coupled. SHBG, how sensitive your androgen receptors are, and other hormones, oestradiol and cortisol among them, all shape how a given level feels, so two men at the same percentile can feel very different. That's why a symptom-led evaluation matters as much as the lab result, and why the quiz route on this page exists for people without one.

Around a twentieth of male levels. The median for women aged 18 to 25 is about 35 ng/dL, easing to roughly 20 ng/dL after menopause. Female reference ranges are less settled than male ones, with a lot of variation between labs, and menopausal status predicts your level better than age does. Treat a female percentile from this page as a rougher estimate than the male one.

Yes, modestly. Weight loss in obese men raises testosterone by 50 to 100 ng/dL on average. Resistance training gives a small short-lived bump and no reliable change to baseline in men who already train. Better sleep (above all treating sleep apnoea) and lower chronic stress show measurable effects, as does keeping alcohol moderate. Set any of them against the age-related decline in the table and they're small.

Only if two things are true at once, a confirmed clinically low level, typically below the age-adjusted 10th percentile, and consistent symptoms to go with it. It isn't for a cosmetic lift or for men whose level is normal for their age. Risks include polycythaemia, suppressed fertility, cardiovascular questions still argued over, and dependence on staying on it. Men with low testosterone often ask about erectile dysfunction prevalence by age too, since the two share vascular and hormonal roots.

Safe enough under supervision for the right patient, and the evidence improved in 2023. The TRAVERSE trial (N=5,246 men, NEJM), the first large randomised controlled trial powered for cardiovascular outcomes, found TRT didn't raise the risk of major adverse cardiovascular events against placebo in men aged 45 to 80 who already carried cardiovascular risk. Known risks include erythrocytosis (a raised red cell count), acne, worse sleep apnoea and suppressed natural production, and it's ruled out for men trying to conceive and for untreated severe sleep apnoea. Where low testosterone is real, the gains can include energy, libido, mood, bone density and body composition. A clinician who has seen your full blood panel and history makes the call.