Normal Testosterone Levels in Men: What Your Labs Really Say

Medically reviewed by Meg LaFerriere, APRN · Regulate Rx, Lee’s Summit, MO

Your result says “within range,” but you still don’t feel like yourself. Both things can be true, and it helps to know why.

What is a normal testosterone level for men?

Total testosterone is reported in nanograms per deciliter (ng/dL). Most labs list an adult male reference range that starts around 250 to 300 ng/dL and tops out somewhere around 800 to 1,000 ng/dL. The exact numbers depend on the lab and the test method.

The AUA guideline uses a total testosterone below 300 ng/dL as a reasonable cutoff to support a diagnosis of low testosterone, when symptoms are also present and the result is confirmed on a second morning test.

Why can a “normal” result miss what’s going on?

A normal result is reassuring, but a few things can make a single number less clear than it looks:

• Timing: afternoon draws can read lower or higher than your true morning level, depending on the day.
• SHBG: sex hormone binding globulin carries testosterone in your blood. If SHBG is high, as it can be with aging, thyroid issues or some medications, total T may look normal while free (usable) testosterone is low.
• Borderline values: a result just above the cutoff may be low on a repeat test.
• Lab variability: different labs and methods can give different numbers for the same blood.

This is why guidelines recommend repeat morning testing, and free testosterone measurement when total levels are borderline.

Does normal testosterone mean you shouldn’t feel symptoms?

Not necessarily, but be careful with this idea. If repeat testing is normal, testosterone is probably not the main cause of your symptoms. Guidelines don’t recommend testosterone therapy for men with normal levels, because the benefits aren’t established and the risks still apply.

A good evaluation keeps looking. Sleep apnea, depression, thyroid disease, anemia, low vitamin levels, diabetes, alcohol and medications can all cause fatigue, low libido or brain fog.

It’s also worth tracking your results over time. A man whose levels have dropped steadily across several years, even within range, may want to keep an eye on weight, sleep and other contributors, and retest if symptoms change.

How do total, free and bioavailable testosterone differ?

Measure	What it tells you
Total testosterone	All testosterone in the blood, bound and unbound. The standard first test.
Free testosterone	The small unbound portion available to tissues. Useful when SHBG is abnormal.
SHBG	The protein that binds testosterone. Changes how total T should be interpreted.

Free testosterone can be measured directly or calculated from total testosterone, SHBG and albumin. Your practitioner chooses based on your situation.

What should you ask about your testosterone results?

Bring these questions to your visit:

1. Was my blood drawn in the early morning?
2. Has my total testosterone been confirmed with a second test?
3. Would free testosterone or SHBG help clarify things?
4. Are my LH and FSH normal?
5. If my levels are normal, what else could explain how I feel?

At Regulate Rx in Lee’s Summit, Meg LaFerriere, APRN, reviews your results line by line. Learn more about our men’s hormone program or check lab pricing.

Frequently asked questions

Does testosterone go down with age?

On average, yes, by roughly 1% a year after the 30s or 40s, though the pace varies. Many older men still have levels within the normal range, and health factors like weight and sleep often matter as much as age.

Is higher testosterone always better?

No. The goal of treatment is to bring confirmed low levels into a normal range, not above it. Levels that are too high raise the risk of side effects like elevated red blood cell counts.

What time of day should testosterone be tested?

Guidelines recommend an early-morning draw, typically before 10 am, when levels are highest and most consistent. Men who work night shifts may need a different plan, so ask your practitioner.

Sources: American Urological Association 2018 Testosterone Deficiency Guideline; Endocrine Society Clinical Practice Guideline (2018); Mayo Clinic; Cleveland Clinic; NIH/MedlinePlus

This article is for general education and isn’t medical advice. Treatments aren’t right for everyone, and results vary. Our practitioner reviews your health history before any treatment.