Convert testosterone between nmol/L, ng/dL, ng/mL and more, or calculate free and bioavailable testosterone from total T, SHBG and albumin.

Unit conversion and an ISSAM/Vermeulen binding estimate. Use your laboratoryโ€™s range and clinicianโ€™s interpretation; results do not diagnose a condition or guide treatment. Binding estimates can be unreliable in pregnancy or with competing SHBG-binding steroids.

Related Calculators

Testosterone Conversion Formula

The following equation is used to convert testosterone levels between units.

ng / dL = nmol / L ร— 28.842
  • When converting from nmol/L, multiply by 28.842 to obtain ng/dL.
  • When converting from ฮผg/dL, multiply by 1000 to obtain ng/dL.
  • If the value is already in ng/dL, no conversion is necessary.

To convert a testosterone value, first change the input to ng/dL and then convert to your desired unit.

What is a Testosterone Conversion?

Definition:

Testosterone unit conversion changes the concentration unit; it does not make different assays or reference populations interchangeable. This calculator uses a molar mass convention of 288.42 g/mol. Its optional adult total-testosterone comparisons use Roche Elecsys Testosterone II example 5thโ€“95th percentiles, not universal diagnostic thresholds; use your own laboratoryโ€™s interval.

The free/bioavailable mode uses the ISSAM/Vermeulen mass-action convention with measured total testosterone, SHBG and albumin. Albumin molarity is albumin in g/L ร— 1.45 ร— 10โปโต; Ka = 3.6 ร— 10โด L/mol and Ks = 1 ร— 10โน L/mol. Bioavailable testosterone includes free and albumin-bound testosterone. Estimates can be unreliable in pregnancy or with competing SHBG-binding steroids. No universal 0.35 nmol/L diagnostic cutoff is assumed: an optional comparison accepts a laboratory or clinician-supplied threshold. Results do not diagnose a condition or guide treatment.

How to Calculate Testosterone Conversion?

Example Problem:

The following example outlines the steps needed to convert a testosterone value from nmol/L to ng/dL.

First, enter the testosterone value in nmol/L. In this example, the input value is 2 nmol/L.

Next, convert it to ng/dL using the conversion factor:

ng/dL = nmol/L * 28.842

ng/dL = 2 * 28.842

ng/dL = 57.684 (57.68 rounded to two decimals)

FAQ

What are the common units used for measuring testosterone?

Testosterone levels are typically reported in nanograms per deciliter (ng/dL), nanomoles per liter (nmol/L), or micrograms per deciliter (ฮผg/dL).

Why is unit conversion important in testosterone measurement?

Converting between units ensures that testosterone values are accurately compared across different laboratories and research studies, avoiding confusion caused by varying measurement systems.

Can this calculator be used for other hormone conversions?

This calculator is specifically designed for testosterone unit conversion; for other hormones, please refer to their specific conversion factors or consult a medical professional.