Testosterone Ranges – What is the Norm?

There are any number of reasons why you might want to boost your Testosterone. Improving your stamina in the gym or on the sporting field, promote a healthier immune system, or putting some bounce back into your bedroom are all positive outcomes to healthy testosterone levels. In fact their are wide range of physical and mental issues affecting men that can be improved with an increase of testosterone. We recommend you seeing your doctor and getting a blood test if you think you may suffer from low test.

So What are Healthy Levels?

Testosterone is measured in nanograms per decilitre (ng/dl). The consensus between multiple research centres is that a range of approximately 280-1050 ng/dl is considered to be a normal range. (1) (2) (3)

Testosterone declines in men over time and on average from the age of 30, levels can be expected to drop by approximately 1% per year.

Male
Age:                                  T Level (ng/dL):
0-5 mo.                                 75-400
6 mos.-9 yrs.                        < 7-20
10-11 yrs.                             < 7-130
12-13 yrs.                             < 7-800
14 yrs.                                  < 7-1,200
15-16 yrs.                             100-1,200
17-18 yrs.                             300-1,200
19+ yrs.                                240-950
Avg. adult male                    270-1,070
30+ yrs.                                -1% per year

(4)

Determining abnormalities in T levels are often sufficiently conducted by tests for your total T. However, some irregularities may still exist despite ‘normal’ levels in which case free testosterone and bioavailable testosterone levels can also be assessed. Total testosterone is essentially comprised of 3 types of testosterone:

  1. Most circulating testosterone is bound to sex hormone-binding globulin (SHBG), which in men also is called testosterone-binding globulin.
  2. A lesser fraction is albumin bound and a small proportion exists as free hormone.
  3. Small proportion exists as free hormone

Historically, only the free testosterone was thought to be the biologically active component. However, testosterone is weakly bound to serum albumin and dissociates freely in the capillary bed, thereby becoming readily available for tissue uptake. All non-SHBG-bound testosterone is therefore considered bioavailable.
Healthy ranges for both appear below

TESTOSTERONE, FREE
Males (adult):
20-<25 years: 5.25-20.7 ng/dL
25-<30 years: 5.05-19.8 ng/dL
30-<35 years: 4.85-19.0 ng/dL
35-<40 years: 4.65-18.1 ng/dL
40-<45 years: 4.46-17.1 ng/dL
45-<50 years: 4.26-16.4 ng/dL
50-<55 years: 4.06-15.6 ng/dL
55-<60 years: 3.87-14.7 ng/dL
60-<65 years: 3.67-13.9 ng/dL
65-<70 years: 3.47-13.0 ng/dL
70-<75 years: 3.28-12.2 ng/dL
75-<80 years: 3.08-11.3 ng/dL
80-<85 years: 2.88-10.5 ng/dL
85-<90 years: 2.69-9.61 ng/dL
90-<95 years: 2.49-8.76 ng/dL
95-100+ years: 2.29-7.91 ng/dL

TESTOSTERONE, BIOAVAILABLE
Males
< or =19 years: not established
20-29 years: 83-257 ng/dL
30-39 years: 72-235 ng/dL
40-49 years: 61-213 ng/dL
50-59 years: 50-190 ng/dL
60-69 years: 40-168 ng/dL

Article Resources

1. https://www.healthline.com/health/low-testosterone/testosterone-levels-by-age#adolescence

2. https://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=167&ContentID=testosterone_total

3. https://academic.oup.com/jcem/article/102/4/1161/2884621

4. https://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/83686