Normal Testosterone Levels by Age: Complete Chart & Guide

A normal testosterone level for adult men is often listed around 264–916 ng/dL, depending on the lab and testing method. However, “normal” is not one fixed number. Testosterone levels vary by age, symptoms, health status, time of day, and whether you are measuring total testosterone or free testosterone. LabCorp’s adult male LC/MS-MS reference interval lists 264–916 ng/dL for men over 18, based on healthy non-obese men ages 19–39.

For many men, the real question is not just, “Is my number in range?” It is: Is my testosterone level appropriate for my age, symptoms, and overall health?

This guide breaks down normal testosterone levels by age, explains how to read a testosterone level chart, and outlines when it may be time to get tested or speak with a provider about testosterone replacement therapy.

Disclaimer: This article is educational only and is not a diagnosis or medical advice.

Key Takeaways

• A commonly used adult male total testosterone reference range is approximately 264–916 ng/dL, but lab ranges vary.
• The American Urological Association says clinicians should use total testosterone below 300 ng/dL as a reasonable cut-off to support a diagnosis of low testosterone, but diagnosis also requires symptoms and repeat testing.
• The Endocrine Society recommends diagnosing hypogonadism only in men with symptoms and signs of testosterone deficiency plus consistently low testosterone levels, confirmed with repeat morning fasting testing.
• Free testosterone matters because most testosterone is bound to proteins like SHBG and albumin; only a small fraction circulates in free form.
• Symptoms matter. A “normal” number may still need interpretation if symptoms, SHBG, medications, or metabolic health change the clinical picture.

Normal Testosterone Levels by Age Chart

The table below uses age-related total testosterone data from Endotext, which summarizes Quest Diagnostics HPLC/MS-MS data in normal men. The source reports mean testosterone and 5th–95th percentile ranges by decade. To convert ng/dL to nmol/L, multiply by 0.0347.

Age Range	Mean Total Testosterone	5th–95th Percentile Range	Approx. Mean in nmol/L	Notes
20–29	590 ng/dL	283–1052 ng/dL	20.5 nmol/L	Often considered peak adult years
30–39	546 ng/dL	319–910 ng/dL	18.9 nmol/L	Symptoms may matter more than age alone
40–49	573 ng/dL	310–901 ng/dL	19.9 nmol/L	Decline is not identical for every man
50–59	534 ng/dL	296–909 ng/dL	18.5 nmol/L	Free testosterone and SHBG become more important
60–69	559 ng/dL	290–928 ng/dL	19.4 nmol/L	Lab interpretation should be individualized
70–79	417 ng/dL	168–755 ng/dL	14.5 nmol/L	Lower levels become more common with age
80+	404 ng/dL	92–716 ng/dL	14.0 nmol/L	Clinical context is essential

Important: this chart is a reference guide, not a diagnostic rule. Your lab may use a different assay, reference population, or reporting range.

How to Read a Testosterone Level Chart

A testosterone chart can help you understand where your result sits compared with other men in your age group, but it cannot diagnose low testosterone by itself.

Three things matter:

1. Your total testosterone number — This is the most common screening measurement.
2. Your free testosterone number — This shows how much testosterone is available to tissues.
3. Your symptoms and health context — Fatigue, low libido, erectile changes, mood changes, body composition, sleep, medications, and metabolic health all affect interpretation.

A man with a total testosterone level of 325 ng/dL and clear symptoms may need a different evaluation than a man with the same number and no symptoms.

Testosterone Levels in Your 20s

Men in their 20s are often near their adult testosterone peak. In the Endotext table, men ages 20–29 had a mean total testosterone level of 590 ng/dL, with a 5th–95th percentile range of 283–1052 ng/dL.

A low reading in your 20s should not be ignored, especially if it comes with symptoms such as low libido, erectile changes, fatigue, low mood, poor recovery, or loss of strength. However, a single blood test is not enough. Testosterone can be affected by sleep, illness, calorie restriction, stress, medications, alcohol, and time of day.

If a younger man has symptoms and a low or borderline result, the next step is usually repeat morning testing and a broader lab review.

Read more: Can Testosterone Therapy Help with Fatigue and Focus?

Testosterone Levels in Your 30s

In the Endotext data, men ages 30–39 had a mean total testosterone level of 546 ng/dL, with a 5th–95th percentile range of 319–910 ng/dL.

Many men first start searching for testosterone levels in their 30s because they notice changes in energy, motivation, gym performance, body composition, or sex drive. But not every symptom is caused by testosterone.

Sleep debt, weight gain, high stress, alcohol intake, insulin resistance, and overtraining can all contribute to symptoms that feel like low T. That is why a provider-guided evaluation is important.

Testosterone Levels in Your 40s

In men ages 40–49, the Endotext table reports a mean total testosterone level of 573 ng/dL, with a 5th–95th percentile range of 310–901 ng/dL.

This is also the decade when more men begin to notice symptoms that overlap with low testosterone, including lower libido, reduced morning erections, slower workout recovery, increased abdominal fat, lower motivation, or changes in mood.

The American Urological Association emphasizes that testosterone deficiency is a clinical diagnosis, meaning low testosterone levels should be interpreted together with symptoms and signs.

Testosterone Levels in Your 50s

For men ages 50–59, the Endotext data shows a mean total testosterone level of 534 ng/dL, with a 5th–95th percentile range of 296–909 ng/dL.

This is where a total testosterone result near the lower end of the range may deserve closer attention, especially if symptoms are present. A result around 300 ng/dL may be “borderline” depending on the lab, but it may still be clinically meaningful if symptoms are consistent and repeat testing confirms the pattern.

In this age group, providers may also look more closely at free testosterone, SHBG, metabolic markers, sleep apnea risk, prostate health, cardiovascular history, and medication use.

Read more: 5 Signs of Low Testosterone in Men Under 50: Fatigue, Low Mood & What to Do

Testosterone Levels in Your 60s and Beyond

The Endotext table reports a mean total testosterone level of 559 ng/dL for ages 60–69, 417 ng/dL for ages 70–79, and 404 ng/dL for men over 80. The lower percentiles also drop more noticeably in older groups.

However, lower testosterone with age does not automatically mean every older man needs TRT. The Endocrine Society recommends against routinely prescribing testosterone therapy to all men 65 or older with low testosterone. Instead, it suggests individualized treatment only when symptoms or relevant conditions are present and morning testosterone levels are consistently and unequivocally low.

Total Testosterone vs. Free Testosterone: What Is the Difference?

Total testosterone measures all testosterone in the blood, including testosterone bound to proteins.

Free testosterone measures the unbound fraction that can more readily act on tissues. LabCorp explains that most serum testosterone is bound to SHBG or albumin, and only about 0.5% to 2% circulates in free form.

This matters because a man may have a total testosterone level that looks “normal,” but if SHBG is high, free testosterone may be lower than expected.

LabCorp notes that free testosterone can be useful in men with borderline total testosterone because changes in SHBG can significantly affect biologically available testosterone. It also lists aging, hyperthyroidism, estrogens, HIV disease, anticonvulsant therapy, and liver disease as factors that can increase SHBG, while obesity, diabetes, hypothyroidism, glucocorticoid therapy, androgenic steroid therapy, nephrotic syndrome, and acromegaly can decrease SHBG.

Read more: Is Low Testosterone Causing Your Depression? The Evidence You Need to Know

Free Testosterone Levels by Age

Free testosterone ranges also vary by lab and method. The table below uses LabCorp’s calculated free testosterone reference ranges by age.

Age Range	LabCorp Calculated Free Testosterone Range
18–30	47.7–173.9 pg/mL
31–40	42.3–190.0 pg/mL
41–50	30.3–183.2 pg/mL
51–60	35.8–168.2 pg/mL
61–70	34.7–150.3 pg/mL
71–80	31.7–120.8 pg/mL
81–100	20.7–97.4 pg/mL

Free testosterone should be interpreted carefully because different labs use different methods, including calculated free testosterone, equilibrium dialysis, and direct assays.

What Causes Testosterone to Decline With Age?

Testosterone changes with age, but aging is not the only factor. Some men maintain strong levels into later life, while others experience earlier or more significant decline.

Common contributors include:

• poor sleep or sleep apnea
• increased body fat
• insulin resistance or diabetes
• chronic stress
• heavy alcohol use
• opioid or corticosteroid use
• pituitary or testicular disorders
• chronic illness
• under-eating or overtraining
• certain medications

Endotext notes that aging is associated with hormonal changes, but also highlights that muscle loss and aging-related performance decline involve many other factors, including growth hormone and IGF-1, lifestyle, nutrition, medications, inactivity, chronic illness, and nervous system changes.

This is why TRT should not be approached as a quick fix without understanding the full clinical picture.

Low Testosterone Symptoms: By the Numbers vs. By Feel

Low testosterone symptoms can affect physical, sexual, mental, and metabolic health.

Common symptoms may include:

• low libido
• erectile dysfunction or weaker erections
• reduced morning erections
• fatigue
• low motivation
• depressed mood or irritability
• brain fog
• reduced muscle mass
• increased body fat
• weaker workout recovery
• low stamina
• poor sleep
• reduced bone density in some cases

But symptoms are not always specific. Fatigue, for example, can come from low testosterone, but it can also come from poor sleep, thyroid issues, anemia, depression, stress, nutrient deficiencies, overwork, or chronic illness. The AUA guideline notes that fatigue may be associated with low testosterone but is nonspecific and can be attributed to other conditions.

That is why symptoms and labs should be evaluated together.

When Should You Get Your Testosterone Tested?

You may want to consider testing if you have persistent symptoms such as low libido, erectile changes, fatigue, low motivation, reduced strength, increased abdominal fat, poor recovery, or mood changes.

Testing is especially worth discussing if you have risk factors such as:

• obesity
• type 2 diabetes
• sleep apnea
• chronic opioid use
• infertility concerns
• history of chemotherapy or testicular radiation
• pituitary disorders
• unexplained anemia
• low bone density

The AUA guideline says clinicians should consider measuring total testosterone in patients with certain conditions, including unexplained anemia, bone density loss, diabetes, chemotherapy exposure, testicular radiation exposure, HIV/AIDS, chronic narcotic use, male infertility, pituitary dysfunction, and chronic corticosteroid use, even without classic symptoms.

Read more: Is Low Testosterone Causing Your Depression? The Evidence You Need to Know

How Testosterone Testing Works

Testosterone should usually be tested in the morning because levels fluctuate throughout the day. The Endocrine Society recommends confirming diagnosis by repeating morning fasting total testosterone measurements.

A complete hormone evaluation may include:

• total testosterone
• free testosterone
• SHBG
• LH and FSH
• estradiol
• prolactin
• CBC
• CMP
• lipid panel
• A1C or fasting glucose
• PSA when appropriate
• thyroid markers when symptoms overlap

The Endocrine Society also recommends measuring LH and FSH to distinguish between primary testicular hypogonadism and secondary pituitary-hypothalamic hypogonadism in men diagnosed with hypogonadism.

What to Do If Your Testosterone Is Low

If your testosterone comes back low or borderline, do not jump straight to treatment without confirmation.

A responsible next step usually looks like this:

1. Repeat morning testing — One low result may not be enough.
2. Review symptoms — A provider should connect the number to how you feel.
3. Check free testosterone and SHBG — This helps explain cases where total testosterone does not tell the whole story.
4. Look for reversible causes — Sleep, body weight, medications, alcohol, stress, and metabolic health may all matter.
5. Review fertility goals — TRT can reduce sperm production and may not be appropriate for men trying to conceive.
6. Discuss treatment options — TRT may be considered when symptoms and consistently low levels support the diagnosis.
7. Monitor after starting therapy — Follow-up labs and symptom review are essential.

The Endocrine Society recommends against testosterone therapy in men planning fertility in the near term and in men with certain conditions including breast or prostate cancer, elevated hematocrit, untreated severe obstructive sleep apnea, uncontrolled heart failure, recent myocardial infarction or stroke, or thrombophilia.

When TRT Becomes a Consideration

TRT may be considered when a man has:

• symptoms consistent with low testosterone
• repeatedly low morning testosterone levels
• appropriate clinical evaluation
• no contraindications
• clear understanding of risks and monitoring
• provider-supervised treatment plan

The goal of TRT is not to push every man to the top of a range. The goal is to restore testosterone to an appropriate level while monitoring symptoms, safety markers, and long-term health.

At Drip Lounge, testosterone consultations should be positioned around provider-guided evaluation, lab review, symptom context, and personalized treatment planning.

Frequently Asked Questions

What is a normal testosterone level for a man?

A commonly used adult male total testosterone reference range is about 264–916 ng/dL, though ranges vary by lab and method. Some clinical guidelines use below 300 ng/dL as a reasonable cut-off to support low testosterone diagnosis when symptoms are also present.

What is a normal testosterone level by age?

Normal levels vary widely by decade. In one Endotext table, mean total testosterone was 590 ng/dL for ages 20–29, 546 ng/dL for ages 30–39, 573 ng/dL for ages 40–49, 534 ng/dL for ages 50–59, 559 ng/dL for ages 60–69, and 417 ng/dL for ages 70–79.

At what age does testosterone start to decline?

Testosterone often begins to decline gradually after early adulthood, but the pattern varies. Age matters, but sleep, body composition, medications, metabolic health, and chronic illness can all influence testosterone levels.

What is considered low testosterone for a 50-year-old?

There is no single number that applies to every 50-year-old. Many clinicians use total testosterone below 300 ng/dL as a reasonable cut-off to support low testosterone diagnosis, but symptoms and repeat morning tests are still required.

Can testosterone levels be normal but you still have low T symptoms?

Yes. Symptoms may occur with borderline total testosterone, low free testosterone, high SHBG, poor sleep, stress, metabolic issues, or other medical conditions. That is why a full evaluation often includes total testosterone, free testosterone, SHBG, and symptom review.

How is testosterone level tested?

Testosterone is measured with a blood test, ideally in the morning. The Endocrine Society recommends repeat morning fasting total testosterone testing to confirm consistently low levels.

What testosterone level requires treatment?

No testosterone level automatically requires treatment by itself. Treatment decisions should be based on symptoms, consistently low morning testosterone, medical history, fertility goals, contraindications, and provider judgment.

The Bottom Line

Normal testosterone levels by age can provide a helpful reference, but they do not tell the whole story. A total testosterone result may be technically “normal” and still deserve closer review if symptoms, free testosterone, SHBG, or health context suggest a problem.

For many adult men, a total testosterone reference range around 264–916 ng/dL is commonly used, while below 300 ng/dL is often used as a clinical cut-off to support low testosterone diagnosis when symptoms are present and testing is repeated.

If you are experiencing low libido, fatigue, reduced strength, poor recovery, mood changes, or other symptoms that may be connected to low testosterone, the next step is not guessing. It is proper testing and provider-guided interpretation.

At Drip Lounge, testosterone consultations are designed to help you understand your labs, symptoms, and options with a personalized, medically guided approach.