Free Testosterone
Result
Free Testosterone — free online calculator.
Formula
Free T calculated using Vermeulen equation (SHBG, albumin binding constants) — for clinical reference only.
- Free Testosterone calculates its result from Total testosterone, User/reference free fraction (%). It uses the formula Free T calculated using Vermeulen equation (SHBG, albumin binding constants) Free T calculated using Vermeulen equation (SHBG, albumin binding constants) — for clinical reference only.. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Total testosterone, User/reference free fraction. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Free Testosterone
- Total testosterone: 500
- User/reference free fraction: 2 %
Using Total testosterone = 500, User/reference free fraction (%) = 2, the calculated result is 10.
Sample result: Calculating…
Frequently asked questions
What does the Free Testosterone calculate?
Free Testosterone — free online calculator.
Which values should I enter?
Enter Total testosterone, User/reference free fraction using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Free T calculated using Vermeulen equation (SHBG, albumin binding constants)
Free T calculated using Vermeulen equation (SHBG, albumin binding constants) — for clinical reference only..
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.