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Testosterone Unit Converter
Convert between common units for total, free, and bioavailable testosterone.
Total Testosterone
ng/dL600
ng/mL6
nmol/L20.8
Free / Bioavailable T
pg/mL100
ng/dL10
pmol/L346.72
Conversion factors used:
- Total T: 1 ng/dL = 0.03467 nmol/L
- Free T: 1 pg/mL = 3.467 pmol/L
- Molar mass: ~288.42 g/mol
About this tool
Convert between the common testosterone units — ng/dL, nmol/L, and pg/mL for free testosterone — instantly. Labs in different countries use different units; this tool bridges them so you can compare results across reports.
How to use it
- 1 Enter your lab value.
- 2 The tool converts to all other units automatically.
- 3 Use the free-testosterone section for pg/mL ↔ pmol/L.
Frequently asked questions
What is the difference between total and free testosterone?
Total T includes testosterone bound to SHBG and albumin. Free T is the unbound, active fraction. Both matter — low free T with normal total T can still cause symptoms.
Why are my US and European lab values so different?
The US typically uses ng/dL; Europe uses nmol/L. The numerical values differ by a factor of ~0.0347, but represent the same concentration.
Educational use only — not medical advice. Results are estimates based on published formulas and models.