free

  1. M

    Free T low, total t high.

    Free T... My total test came back at 900 on a scale of 250-850. But my free came back low, 11, on a scale of 9-22. shbg is 45, Inj frequency is 2x a week. (80 mg total for week) What else should I be looking at as to why my free T is lower?? THX
  2. A

    Phone app to compute free T (Vermeulen, Mazer, Södergård) and immunoassay calibration

    Dear Excelmale members, Recently, I've been working with the help of a friend (actually he did most of the work) on an Android software that helps in the computation of free T (contains Vermeulen, Mazer, Södergård, ...) and that generates reports that link the values obtained to the current...
  3. D

    Please delete

    Thread deleted
  4. C

    Is my free testosterone low?

    As the title says, is my free testosterone low? I am in my 20s for reference
  5. DixieWrecked

    Free Test and Symptom Resolution

    I was just curious where everyones free test sits according to your labs and how you feel. I ask that teh discussion be kept to a minimum. I know there are many other factors besides free t but i would like to take a survey just to get this one data point. example: I am at 25pg/ml and i feel...
  6. J

    Tru T calculator - what is the range?

    Labcorp 'normal' range for Free T is 6.8 - 21.5. Obviously, the Tru T calculator produces much different results. For example, on a recent test, my Labcorp Free T was 27.7. The Tru T measure yielded 46. This begs the question, what is the ideal range using the Tru T method. I saw in some...
  7. Nelson Vergel

    New Testosterone Blood Test on DiscountedLabs.com

    This total and free testosterone blood test panel does not have an upper limit for either testosterone fraction. Some bodybuilders using higher dose testosterone may justify the use of this test. For men and women on testosterone replacement doses, this panel is not justified. We offer 2 other...
TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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