Health Numbers
Enter your blood test result to understand where you stand — and what it means for your health.
| Total Testosterone (ng/dL) | Approx. nmol/L | Description |
|---|---|---|
| < 200 ng/dL | < 6.9 | Critically Low |
| 200 – 300 ng/dL | 6.9 – 10.4 | Low |
| 300 – 400 ng/dL | 10.4 – 13.9 | Low-Normal |
| 400 – 700 ng/dL | 13.9 – 24.3 | Normal |
| 700 – 900 ng/dL | 24.3 – 31.2 | High-Normal |
| > 900 ng/dL | > 31.2 | Above Range |
Testosterone level is an important indicator of hormonal health. Low testosterone levels have been associated with cardiovascular disease, obesity, diabetes, decreased libido, decreased energy, and depression.
A simple blood test is used to measure total testosterone level. Normal testosterone levels range from 300 ng/dL to 1050 ng/dL. Levels below 300 ng/dL are considered clinically low. EMG also provides more information on low testosterone and testosterone replacement therapy.
Ultimately, the diagnosis of low testosterone and the decision to pursue treatment is considered on an individual basis — not simply based on numerical guidelines for generally accepted "normal" levels.
Testosterone production peaks in the late teens and early twenties, then declines at approximately 1–2% per year after age 30. By age 70, many men have total testosterone levels 30–50% lower than they did at their peak.