Testosterone (Free): normal range and what it means
Short answer: The normal testosterone (free) range is 47 – 244 pg/mL for men and 0.3 – 3.2 pg/mL for women. In SI units that is about 163 – 846 pmol/L for men and 1 – 11 pmol/L for women. Labs differ a little, so also check the range printed on your report.
Check your value
Where does your testosterone (free) sit?
Same number as ng/L.
The healthy range is different for women and men.
Your result
Type the number from your lab report to see where it sits.
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Information, not a diagnosis. Talk to a doctor about your result, and sooner if you feel unwell.
The biologically active fraction of testosterone.
Normal range
This marker’s healthy range depends on sex and age.
| Normal range | Men | Women |
|---|---|---|
| Low | < 47 pg/mL | < 0.3 pg/mL |
| Normal | 47 – 244 pg/mL | 0.3 – 3.2 pg/mL |
| High | ≥ 244 pg/mL | ≥ 3.2 pg/mL |
Free calculator
Free testosterone calculator (Vermeulen)
Free testosterone from total testosterone, SHBG and albumin (Vermeulen 1999)
Sources: Vermeulen A, Verdonck L, Kaufman JM. A critical evaluation of simple methods for the estimation of free testosterone in serum. J Clin Endocrinol Metab 1999;84(10):3666-3672.
ng/dL in the US, nmol/L in most other countries
In nmol/L
Leave empty to use a typical 4.3 g/dL (43 g/L)
Your result
Enter the numbers from your lab report to see your result.
Use total testosterone from a morning blood test (before 10 am), when it is highest. A calculated free testosterone is an estimate; it is close to the lab’s reference method in most people.
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A pointer, not a diagnosis. Talk to a doctor about your result, and sooner if you feel unwell.
What it measures
The fraction of testosterone not bound to protein and therefore available to your tissues. It often explains symptoms better than the total does, especially when SHBG is unusual.
What moves it
The fraction not bound to SHBG, so it moves with sleep, body fat, training load, alcohol and age. Draw timing matters — it peaks in the morning.
How to bring it into range
Sleep, resistance training, body fat and alcohol all move it. Test in the morning, when levels peak.
How fast it responds
Eight to twelve weeks.
Also reported as: free testosterone
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Common questions
- What is the normal testosterone (free) range?
- The normal testosterone (free) range is 47 – 244 pg/mL for men and 0.3 – 3.2 pg/mL for women. In SI units that is about 163 – 846 pmol/L for men and 1 – 11 pmol/L for women. Labs differ a little, so also check the range printed on your report.
- What does a high Testosterone (Free) mean?
- A value above the reference band means Testosterone (Free) is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my Testosterone (Free)?
- Sleep, resistance training, body fat and alcohol all move it. Test in the morning, when levels peak.
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Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.