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Testosterone to Estradiol Molar Ratio

Compare testosterone and estradiol concentrations on the same molar scale.

Formula & worked example
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Calculator inputs

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How to use this calculator

Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.

Formula and method

Testosterone 288.5 ng/dL and estradiol 367.13 pg/mL give a molar ratio of approximately 7.41925 using the retained rounded conversions.

Molar ratio = testosterone (pmol/L) / estradiol (pmol/L).

Worked example

Enter these known values and leave the other values blank.

Testosterone (T): 288.5 ng/dL
Estradiol (E2): 367.13 pg/mL

Molar testosterone / estradiol ratio: 7.42

Assumptions and limitations

Both hormones are converted to pmol/L before division. This molar ratio differs from simply dividing ng/dL by pg/mL. Captured molecular conversion coefficients are used; no clinical target range is assigned. Testosterone conversion uses 288.5 g/mol and estradiol conversion uses 3.6713 pmol/L per pg/mL; these are rounded factors.
Use the displayed units and measurements from the same context. Editable fields support arithmetic inverses when enough independent values are supplied. Clear a preset value before solving it as an unknown.
This tool performs the stated arithmetic model. It does not establish a diagnosis, prescribe treatment or replace laboratory and clinical assessment.

Common questions

What does this calculation represent?

Both hormones are converted to pmol/L before division. This molar ratio differs from simply dividing ng/dL by pg/mL. Captured molecular conversion coefficients are used; no clinical target range is assigned.

Can I solve for a different field?

Clear the unknown field and enter enough independent values in the remaining editable controls. A relationship cannot recover a unique value when a dividing quantity is zero.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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