“Free Testosterone” Unit Conversion

jacb

Active Member
The US generally use nanograms/decilitre and picograms/millilitre, other countries, including New Zealand, use nanomoles/litre and picomoles/litre for their Free Testosterone results.

I set out to find the conversion values.

I found two useful links that can with some thought provide the answer, but I have yet to find an online calculator that will convert Free Testosterone results from pmol/L directly to ng/dL.

Link 1

Link 2

Unfortunately things got a little more complicated in this link

Link 3

Do you know of a better online conversion tool for FT, pmol/L directly to ng/dL?
 
Last edited:
The US generally use nanograms/decilitre and picograms/millilitre, other countries, including New Zealand, use nanomoles/litre and picomoles/litre for their Free Testosterone results.

I set out to find the conversion values.

I found two useful links that can with some thought provide the answer, but I have yet to find an online calculator that will convert Free Testosterone results from pmol/L directly to ng/dL.

Link 1

Link 2

Unfortunately things got a little more complicated in this link

Link 3

Do you know of a better online conversion tool for FT, pmol/L directly to ng/dL?


Screenshot (10498).webp

Screenshot (10499).webp
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

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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