Free Testosterone Calculation (Vermeulen)

Calculate free testosterone from total testosterone, SHBG, and albumin using Vermeulen 1999 equation. Normal free T males 50-210 pg/mL; females 1-8.5 pg/mL.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate free testosterone from total testosterone, SHBG, and albumin using Vermeulen 1999 equation. Normal free T males 50-210 pg/mL; females 1-8.5 pg/mL

Each component has a specific meaning:

  • SHBG — The shbg recorded for the scenario being assessed.
  • Albumin — The albumin recorded for the scenario being assessed.

Note: Interpret the free testosterone result against the thresholds and context described above.

How to Use

Enter the SHBG, albumin for the scenario you are assessing. Calculate free testosterone from total testosterone, SHBG, and albumin using Vermeulen 1999 equation. Normal free T males 50-210 pg/mL; females 1-8.5 pg/mL. Use the free testosterone result to inform your calculation.

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