Testosterone Calculator – Analyze Your T Levels & Normal Ranges
Check your testosterone level against age‑adjusted normal ranges. Identify deficiencies and understand hormonal health. Free, no sign‑up, educational tool only.
Updated for 2026
Personal Details
✓ Last updated: March 2026 | Built with CRA-official rates, Bank of Canada data, and OSFI guidelines
How to Use This Calculator
Select your gender and input your age.
Input your total testosterone level from a blood test.
Choose ng/dL or nmol/L.
See your level compared to age-adjusted normal ranges.
Understanding Your Results
- Total TestosteroneThe total amount of testosterone in your blood, including bound and free forms.
- Normal Range by AgeMen 18-30: 350-1000 ng/dL. 31-40: 300-950 ng/dL. 41-50: 280-900 ng/dL. 51-60: 250-850 ng/dL. 60+: 200-800 ng/dL.
- DeficiencyLevels below the normal range for your age may indicate deficiency.
- Free TestosteroneThe unbound, biologically active form of testosterone. Total testosterone is the common lab test.
Key Tips
- ✓Testosterone levels naturally decline with age.
- ✓Symptoms of low testosterone include fatigue, low libido, and muscle loss.
- ✓A blood test is required for accurate testosterone measurement.
- ✓Lifestyle factors like sleep, exercise, and diet affect testosterone levels.
- ✓Consult a healthcare provider for interpretation and treatment options.
Related Calculators
Understanding Testosterone Levels
What is Testosterone?
Testosterone is the primary male sex hormone, responsible for muscle mass, bone density, fat distribution, red blood cell production, and sexual function. It naturally declines with age.
Normal Ranges by Age
Men 18-30: 350-1000 ng/dL. 31-40: 300-950 ng/dL. 41-50: 280-900 ng/dL. 51-60: 250-850 ng/dL. 60+: 200-800 ng/dL.
Low Testosterone Symptoms
Fatigue, low libido, erectile dysfunction, muscle loss, weight gain, depression, and sleep disturbances.
When to See a Doctor
If you experience symptoms of low testosterone and your levels are below the normal range, consult a healthcare provider for evaluation and treatment options.
Example: 35-Year-Old Male, 500 ng/dL
Male, 35 years, total testosterone 500 ng/dL.
- Gender
- Male
- Age
- 35 years
- Testosterone
- 500 ng/dL
- Normal Range (31-40)
- 300-950 ng/dL
- Status
- Normal
- Deficiency Status
- Not Deficient
- Recommendations
- Continue healthy lifestyle, maintain good sleep and exercise
Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
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