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What Are Normal Testosterone Levels by Age?

Testosterone Levels by Age

Protecting testosterone levels in later years of life from decline is as crucial for women as it is for men. Diagnostic blood tests measure testosterone levels by age and gender and provide the hormone replacement doctor with vital information that can lead to a diagnosis of Low T and subsequent treatment.

The frequently discussed types of testosterone levels are:

  • 1. Total testosterone
  • 2. Free testosterone
  • 3. Bioavailable testosterone

Let us take an in-depth look at each of these testosterone levels:

  • Importance of Total Testosterone

Total testosterone is the measurement of all testosterone in your bloodstream, including that which is bound tightly to SHBG (sex hormone binding globulin) for transport through the body to androgen receptors, that which is bound loosely to albumin, and unbound testosterone, or freely available for use. Total testosterone readings are important because they let the hormone specialist know if the body is currently manufacturing enough testosterone for daily use.

  • Importance of Free Testosterone

Doctors check free testosterone levels by age to be certain that the testosterone is not having a problem separating from SHBG for availability to androgen receptor cells. Free testosterone is a critical reading because it provides that the body has enough testosterone ready for use. The other reason free testosterone levels are sometimes low is due to an increase in testosterone conversion into estradiol.

Bioavailable testosterone levels are not as important because they are the sum of free and albumin-bound testosterone as the binding is not strong and the testosterone can still separate readily for immediate use.

Knowing your good testosterone levels by age can help you determine if your symptoms coincide with Low T and if treatment will bring benefits.

Normal Testosterone Levels in Males

In most cases of suspected testosterone deficiency, the hormone specialist will check free and total testosterone levels by age. Male levels vary greatly among different labs, often making it confusing for the inexperienced person to assess Low T. What one lab considers normal might be indicative of a low testosterone diagnosis elsewhere. That is why the hormone doctor looks at more than just the blood test results when making this determination. Symptoms go a long way in assessing the necessity for treatment with supplemental testosterone therapy.

For the measurements on a testosterone levels by age chart, ng/mL , ng/dL, and pg/mL readings are common. Total testosterone is most often measured in ng/dL with free testosterone results in pg/mL.

Age Total Testosterone Range ng/dL Average Testosterone Range ng/dL Free Testosterone Range pg/mL
Testosterone levels at age 30219 – 1009617 – 6684.65 – 19.0
Testosterone levels at age 40201 – 993606 – 6684.26 – 17.1
Testosterone levels at age 50170 – 918562 – 6063.87 – 15.6
Testosterone levels at age 60156 – 700524 – 5623.47 – 13.9

Testosterone levels at age 25 are typically at their peak before they start the gradual decline a few years later. By the time a man reaches 30, he will likely begin to experience a small yearly reduction in testosterone production – typically anywhere from one to two percent each year.

If testosterone levels at age 70 fall into the bottom end of the range scale above, it is likely that many symptoms of Low T will be present and interfere with life.

Normal Testosterone Levels in Females

When we look at the female version of the testosterone levels by age graph , we see that age does not make as much of a difference with women as it does with men. That is, in part, due to the lower beginning testosterone levels in a female’s bloodstream. The other factor, age-related hormone decline, is a serious issue for men due to the rapid decline they face each year. Women, however, do not start to lose testosterone until menopause, when the ovaries cease hormone production.

Our first healthy testosterone levels by age chart for women is that of normal total testosterone for females over and under fifty years old:

Women over 50Greater than 1.0 pg/mL
Women under 50Greater than 1.5 pg/mL

The next testosterone levels by age chart is that of bioavailable testosterone, which varies based on whether a woman is taking oral estrogen:

Age 20 – 50 not using oral estrogen0.8 – 10 ng/dL
Age 20 – 50 using oral estrogen0.8 – 4.0 ng/dL

The final testosterone levels by age ng/dl is that of total testosterone. This number varies the most between labs, with one laboratory setting the scale at 8 – 60 ng/dL, another at 15 – 70 ng/dL and finally, the National Institutes of Health showing normal free testosterone levels between 30 and 95 ng/dL. That is why symptoms also play a role in determining Low T.

You can receive additional information, along with testosterone blood testing from Kingsberg HRT Clinic. Free consultations, convenient laboratories, and affordable treatment options are available from our hormone specialists, so call today for your complimentary, confidential consultation.


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