Free testosterone

Optimal Result: 35 - 155 pg/mL, 3.50 - 15.50 ng/dL, or 10.09 - 44.67 pmol/L.

Testosterone is an androgen (male sex hormone) found in both men and women but in significantly larger quantities in men due to the testes. A small amount is made by our pituitary glands, and in women, by the ovaries. In pubescent boys, testosterone causes the voice to deepen, muscles to get bigger, sperm production to begin, and facial/ body hair to grow. Most of the testosterone in the blood is bound to a protein called sex hormone binding globulin. Testosterone that is not bound (“free” testosterone) may be checked if a man or a woman is having sexual problems, such as:

- Decreased sex drive

- Erectile dysfunction in men

- Infertility in men and women

- Delayed or accelerated puberty in boys

- Male features (deep voice, excessive hairiness) in women

In addition, certain conditions are known to affect free testosterone like hyperthyroidism and some types of kidney disease. 

Age-specific Reference Ranges (for men):

- 0-9 years < 1 pg/mL

- 10-11 years < 4 pg/mL

- 12-13 years < 68 pg/mL

- 14-15 years = 2-95 pg/mL

- 16-17 years = 26-119 pg/mL

- 18 years and older = 32-168 pg/mL

Tanner-stages spefific Reference Ranges (for men):

- Tanner stage I  < 3 pg/mL

- Tanner stage II < 15 pg/mL

- Tanner stage III < 68 pg/mL

- Tanner stage IV = 24-117 pg/mL

- Tanner stage V = 28-165 pg/mL

(To find out more about the different Tanner stages, please refer to: Tanner Stages)

What does it mean if your Free testosterone result is too low?

A low testosterone level in men may be due to:

- Hypothalamic or pituitary disease

- A genetic condition causing decreased testosterone production in young men

- Testicular failure / infertility, which can be genetic (myotonic dystrophy) or due to impairment (due to alcoholism, physical injury, or the mumps)

- A chronic disease like diabetes

A low testosterone level in women is normal and healthy.

What does it mean if your Free testosterone result is too high?

What could a slightly elevated free testosterone level mean in men?

Slightly elevated free testosterone levels in a male can have several implications, and the interpretation may vary depending on the specific value and the individual's overall health. Here are some potential meanings:

→ Normal Variation: It's important to note that testosterone levels can fluctuate naturally throughout the day and over time. Slight elevations may fall within the normal range of variation and may not necessarily indicate a medical issue.

→ Hormonal Imbalance: Elevated free testosterone can sometimes be a sign of a hormonal imbalance. This may be due to conditions like polycystic ovary syndrome (PCOS) in women or other hormonal disorders in both sexes.

→ Symptoms: The significance of elevated free testosterone often depends on the presence of symptoms. Some individuals with higher testosterone levels may experience symptoms such as increased facial or body hair growth, acne, or changes in mood and libido.

→ Underlying Health Conditions: Elevated free testosterone could be associated with certain medical conditions, such as adrenal tumors or hormonal disorders. Further tests and evaluation by a healthcare provider are usually necessary to identify and address any underlying issues.

→ Fertility: In some cases, elevated testosterone levels can impact fertility, affecting sperm production and quality.

It's crucial to consult a healthcare professional for a thorough evaluation if you have concerns about elevated free testosterone levels. They can provide personalized guidance and recommend appropriate interventions if necessary.

What could a highly elevated free testosterone level mean in men?

- Testicular tumors

- Adrenal tumors producing testosterone

- Use of anabolic steroids

- Early puberty

- Congenital adrenal hyperplasia affecting the adrenal glands

Increased testosterone in women may be caused by:

- Ovarian or adrenal gland tumor

- Polycystic ovary syndrome

- Congenital adrenal hyperplasia affecting the adrenal glands

10 000+ happy customers
100% satisfaction
★ ★ ★ ★ ★ customer support

Understand blood, stool, and urine medical results from all your laboratories.

Upload Your Personal Results

Upload Personal Results

For professional account plans go here

for professional account plans go here

Monthly plan

Annual plan

Own it for life

  • Subscription
  • Data entry service included

    Data entry service

    Our exclusive data entry service is a convenient way to get your results into your private dashboard. Simply attach an image or a file of your lab test results, and one of our qualified data entry team members will add the results for you. We support all sorts of files, whether PDFs, JPGs, or Excel. This service is excellent whether you have a lot of reports to upload or are too busy to do the data entry yourself.

  • Instant interpretation
  • Use free data entry form

    Free data entry form

    We strive to make the data entry process easy for you. Whether by offering dozens of templates to choose from that pre-populate the most popular laboratory panels or by giving you instant feedback on the entered values. Our data entry forms are an easy, fast, and convenient way to enter the reports yourself. There is no limit on how many lab reports you can upload.

  • 4000+ biomarkers explained
  • Nutrition recommendations
  • Cancel anytime


$15 /month

billed every month

  • monthly
  • $15 per report
  • ✓ Instant interpretations
  • ✓ 4000+ biomarkers explained
  • ✓ Nutrition recommendations
  • ✓ Free data entry form
  • ✓ Unlimited data
  • ✓ $15 data entry service
  • ✓ Cancel anytime

Most popular

Data entry included


$79 /year

$6.60/month billed annually

  • yearly
  • 5 reports free
  • ✓ Instant interpretations
  • ✓ 4000+ biomarkers explained
  • ✓ Nutrition recommendations
  • ✓ We enter 5 reports for you
  • ✓ Yearly subscription
  • ✓ Cancel anytime

Data entry included


$250 /once

own it for life

  • pay once
  • 10 reports free
  • ✓ Instant interpretations
  • ✓ 4000+ biomarkers explained
  • ✓ Nutrition recommendations
  • ✓ We enter 10 reports for you
  • ✓ No subscription
  • ✓ Dedicated support
  • ✓ Unlimited access

Are You a Health Professional?

Get started with our professional plan

Welcome to Healthmatters Pro.

Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place. Learn more

Pro Monthly Plus

for health professionals

  • ✓ Track multiple clients results
  • ✓ No setup fees
  • ✓ No hidden costs
  • ✓ Instant interpretations
  • ✓ 4000+ biomarkers explained
  • ✓ Includes data entry service
  • ✓ Personal training and support
  • ✓ Cancel anytime

$75 per month

Use promo code to save 10% off any plan.

We implement proven measures to keep your data safe.

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.