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Testosterone Levels by Age — Where Do You Stand?

Enter your age and your total testosterone result (from a blood test) to instantly see how your level compares to other men your age — not just a one-size-fits-all lab range.

Ages 18–90
From a morning blood test
Please enter a valid age (18–90) and testosterone level (50–1800 ng/dL).
LowLow-normalNormalOptimalHigh
Below 300
300–449
450–599
600–799
800+
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Approximate percentile for your age group
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Average for men your age (ng/dL)
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vs. age-group average
How your level compares across all age groups

This tool uses population reference data for educational purposes only. It is not a medical diagnosis. Always consult a qualified healthcare provider about your hormone levels.

Understanding your testosterone level in context

When a man gets his testosterone tested, his lab report shows a single reference range — typically something like 264–916 ng/dL — that covers all adult men regardless of age. A 28-year-old and a 72-year-old with identical results of 300 ng/dL will both see "within normal range" on their paperwork. But those are completely different clinical situations. Comparing your testosterone to men your own age gives a far more meaningful picture of where you actually stand.

Testosterone reference ranges by age — the data

The following ranges are drawn from large population studies including the Massachusetts Male Aging Study, NHANES data, and the harmonized reference ranges published in the Journal of Clinical Endocrinology and Metabolism. They represent typical population distributions, not individual targets — a man can fall below the average for his age group and feel perfectly fine, while another man at the same level may have significant symptoms.

Age group Typical range (ng/dL) Population average Optimal zone
20s400–900~650 ng/dL600–850 ng/dL
30s350–850~600 ng/dL550–800 ng/dL
40s300–800~540 ng/dL500–750 ng/dL
50s280–750~490 ng/dL450–700 ng/dL
60s260–700~430 ng/dL400–650 ng/dL
70s+240–650~360 ng/dL350–550 ng/dL

Why the standard lab range is misleading for most men

The widely used reference range of 264–916 ng/dL was derived from population samples that included men of all ages and varying health statuses. It represents roughly the 5th to 95th percentile of all adult men tested — which means a man at 270 ng/dL is technically "normal" even though he's in the bottom 5 percent of the entire male population. For a 35-year-old man, that same number represents a hormonal profile more typical of a man in his 70s.

This is why age-stratified comparison matters. A result that your lab flags as normal may be significantly below average for men your age — and that gap, especially when combined with symptoms, is clinically meaningful even if it doesn't trigger a flag on your report.

Important nuance: Total testosterone is only part of the picture. Free testosterone — the biologically active fraction, roughly 1 to 3 percent of total — is often more relevant to how a man feels. Two men with identical total testosterone can have very different free testosterone levels depending on their SHBG (sex hormone-binding globulin). If your total testosterone looks reasonable but you still have symptoms, ask your doctor to test free testosterone and SHBG as well.

What drives testosterone decline with age

Testosterone declines at roughly 1 to 2 percent per year after age 30 due to two main mechanisms. First, the Leydig cells in the testes — which produce testosterone — gradually become less numerous and less responsive to LH (luteinizing hormone) signaling. Second, the hypothalamic-pituitary signaling that drives testosterone production becomes less robust over time. Both processes are normal, but several lifestyle factors can significantly accelerate the decline:

  • Excess body fat, particularly abdominal fat, increases conversion of testosterone to estrogen
  • Chronic sleep deprivation — even one week of five-hour nights can reduce testosterone by 10 to 15 percent
  • Chronic psychological stress elevates cortisol, which directly suppresses testosterone production
  • Sedentary lifestyle, particularly the absence of resistance training
  • Heavy or chronic alcohol consumption
  • Nutritional deficiencies, particularly zinc, vitamin D, and magnesium

What to do if your level is below average for your age

If this tool shows your testosterone is below average or low for your age group — especially if you have symptoms — the most useful next step is to discuss the result with a doctor and request a complete hormone panel. A thorough evaluation should include total testosterone (ideally two morning draws taken at least a week apart), free testosterone, SHBG, LH, FSH, and a metabolic panel. This gives a complete picture of whether the issue is primary (the testes) or secondary (the brain's signaling), which matters for treatment decisions.

In parallel, the lifestyle factors listed above are worth addressing regardless of whether you pursue medical treatment — they are independently associated with meaningful improvements in testosterone levels for men in the low-normal range.

Frequently asked questions

About testosterone levels and this reference tool

What is a normal testosterone level for my age? ›
Normal testosterone varies considerably by decade. Men in their 20s typically average around 600–700 ng/dL, men in their 30s around 550–650 ng/dL, men in their 40s around 500–600 ng/dL, men in their 50s around 450–550 ng/dL, men in their 60s around 380–480 ng/dL, and men in their 70s around 300–400 ng/dL. These are population medians — a wide range of individual variation exists within each decade, and symptoms matter as much as where a number falls on a chart.
At what level is testosterone considered clinically low? ›
The American Urological Association defines low testosterone as total T below 300 ng/dL. The Endocrine Society recommends evaluation for symptomatic men with levels below 350 ng/dL. Many experienced clinicians consider men in the 300–450 ng/dL range with significant symptoms to be in a gray zone that warrants a full evaluation — including free testosterone and SHBG — rather than a simple pass/fail based on a single number.
Why does age-based comparison matter more than the lab range? ›
Standard lab reference ranges cover all adult men regardless of age, meaning a 30-year-old and a 75-year-old with the same result both get labeled "normal." But a result of 320 ng/dL represents the hormonal profile of a man 30 to 40 years older than a healthy 30-year-old. Comparing to age-matched peers reveals whether a result is appropriate for your life stage — which is far more clinically meaningful than a one-size-fits-all cutoff.
How fast does testosterone decline with age? ›
Testosterone declines at approximately 1 to 2 percent per year starting around age 30. By age 50, most men have lost 20 to 30 percent of their peak testosterone. By age 70, the decline is typically 35 to 50 percent from peak. The rate varies considerably between individuals — lifestyle factors like body weight, sleep, exercise, and stress can significantly accelerate or slow the trajectory.
Should I get my testosterone tested in the morning? ›
Yes — this is important. Testosterone follows a strong daily rhythm, peaking in the early morning and falling throughout the day. Clinical guidelines recommend blood draws between 7 and 10 AM. Afternoon testosterone can be 15 to 25 percent lower than morning levels in the same man, which can produce a misleadingly low result. For diagnostic purposes, a low result should always be confirmed with a second morning draw taken at least a week later.