Testosterone Levels by Age Calculator
See the typical total testosterone range for your age — and, if you've had bloodwork, exactly where your number falls. Works in both ng/dL and nmol/L.
Typical range · ages 30–39
280–900 ng/dL
Enter your total testosterone above to see where it falls for your age.
These are general reference ranges for education only and vary by laboratory and individual. This tool is not a medical device, diagnosis, or treatment recommendation. Only a licensed healthcare provider can interpret your results.
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Total testosterone reference ranges by age
General reference ranges for total testosterone. These are educational averages — your lab's own range, and your symptoms, always take priority.
| Age | Typical range (ng/dL) | Typical range (nmol/L) |
|---|---|---|
| 18–29 | 300–950 | 10.4–32.9 |
| 30–39 | 280–900 | 9.7–31.2 |
| 40–49 | 250–850 | 8.7–29.5 |
| 50–59 | 230–800 | 8.0–27.7 |
| 60–69 | 210–750 | 7.3–26.0 |
| 70+ | 190–700 | 6.6–24.3 |
Conversion: 1 nmol/L ≈ 28.85 ng/dL. Many US labs cite a single adult reference range of ~264–916 ng/dL; ranges vary by laboratory.
No lab results yet? Start with the 2-minute Testosterone Symptom Check to see whether your symptoms are worth discussing with a doctor.
Frequently asked questions
What is a normal testosterone level by age?+
Most labs report a general adult reference range for total testosterone of roughly 264–916 ng/dL (about 9–32 nmol/L). Levels tend to peak in early adulthood and decline gradually — often around 1% per year after age 30–40. Because labs calibrate differently, the reference range printed on your own result is the one that matters.
What is considered low testosterone?+
Low testosterone (hypogonadism) is generally considered when total testosterone is consistently below the lab's reference range — often cited around 300 ng/dL — alongside symptoms such as low energy, low libido, or mood changes. A single number is not a diagnosis; it should be confirmed with repeat morning testing and evaluated by a doctor.
What's the difference between total and free testosterone?+
Total testosterone measures all the testosterone in your blood, while free testosterone is the small fraction (roughly 1–2%) not bound to proteins and available to your tissues. Free T can be a more useful marker when SHBG is unusually high or low.
Can you increase testosterone naturally?+
Research suggests that quality sleep, resistance training, maintaining a healthy body-fat level, managing stress, and adequate vitamin D and zinc status are associated with healthier testosterone. Results vary by individual. The Thrive app helps you build and track these daily habits.
Keep reading
- Testosterone Levels by Age: The Complete Reference Guide
- Signs of Low Testosterone in Your 20s and 30s
- Free Testosterone Calculator (from SHBG)
- Free Testosterone vs Total Testosterone Explained
- How to Get Your Testosterone Tested
- How to Increase Testosterone Naturally
- The Ultimate Daily Routine for Testosterone Optimization
This calculator is for general educational purposes only and is not medical advice, a diagnosis, or a substitute for professional care. Testosterone reference ranges vary by laboratory, assay, and individual. If you have concerns about your hormone health, consult a licensed healthcare provider.