Testosterone Levels by Age for Men
Normal testosterone values come from large population studies (NHANES, WHO, CDC). They provide a framework for interpreting your results, but your personal medical history always takes priority. This calculator shows normal testosterone ranges by age. Values are current as of 2026 and reviewed regularly to keep you informed.
When to use this calculator
- Quick reference for testosterone health calculations
- Students and healthcare professionals
- Verify lab results against reference ranges
- Educational tool for men's health literacy
- Clinical decision support and reference
Calculation example
- 600 ng/dL at age 35
- Normal
How it works
1 min readNormal testosterone values in health come from large population studies (NHANES, WHO, CDC). They vary by age, sex, ethnicity, and region. These are reference values only—your personal medical history always has priority.
How it's calculated
This calculator applies the formula with the values you enter, checking typical ranges and alerting you if values fall outside normal limits.
Normal reference values
| Parameter | Normal range (adults) |
|---|---|
| Blood pressure | <120/80 mmHg |
| Resting heart rate | 60-100 bpm |
| Temperature | 36.1-37.2°C |
| SpO2 | 95-100% |
| Fasting glucose | 70-100 mg/dL |
| HbA1c | <5.7% |
| Total cholesterol | <200 mg/dL |
| LDL | <100 mg/dL |
| HDL | >40 (men) / >50 (women) |
Final notes
This calculation is a reference guide only. For critical decisions (medical, financial, legal), consult with a qualified specialist. Values are current as of 2026 and reviewed periodically.
Frequently asked questions
What is a normal testosterone level?
Adult males typically have 270–1070 ng/dL, varying by age. Peak levels occur in your 20s and 30s.
What's normal testosterone at age 20-30?
Peak years: 600–900 ng/dL. Testosterone is at its highest during this decade.
What's normal testosterone at age 40-50?
500–700 ng/dL. Testosterone gradually declines about 1% per year after age 30.
What's normal testosterone after age 60?
350–600 ng/dL. Lower levels are normal with aging, but sudden drops warrant medical evaluation.
What does low testosterone mean?
Below 300 ng/dL with symptoms (fatigue, mood changes, low libido) suggests hypogonadism. Consult your doctor.
What factors affect testosterone levels?
Time of day (peak morning), sleep quality, body weight, stress, exercise, and medications all influence levels.
What is testosterone replacement therapy (TRT)?
Medical treatment prescribed by an endocrinologist to restore testosterone when levels are low and symptoms are present.
When should I see a doctor about testosterone?
If levels fall outside normal range, you have symptoms (fatigue, mood changes, erectile dysfunction), or family history of cardiovascular disease.
Can I improve testosterone naturally?
Yes—regular exercise, 7–9 hours sleep, stress management, healthy weight, and vitamin D support optimal levels.