Enter Hormone Values
Formula Used
Mass ratio: progesterone in pg/mL ÷ estrogen in pg/mL.
Molar ratio: progesterone in pmol/L ÷ estrogen in pmol/L.
Progesterone conversion: ng/mL × 1000 = pg/mL. ng/mL × 3.180 = nmol/L.
Estradiol conversion: pg/mL × 3.671 = pmol/L. ng/mL × 1000 = pg/mL.
Inverse ratio: 1 ÷ selected P:E ratio.
Progesterone share: converted progesterone ÷ total converted hormones × 100.
How to Use This Calculator
- Enter the progesterone value from your lab result.
- Select the progesterone unit shown on the report.
- Enter the estrogen or estradiol value.
- Select the matching estrogen unit.
- Choose mass based or molar based comparison.
- Add sample type, phase, cycle day, and notes.
- Press the calculate button.
- Download the CSV or PDF file when needed.
Example Data Table
| Case | Progesterone | Estrogen | Mass P:E Ratio | Common Note |
|---|---|---|---|---|
| Example 1 | 10 ng/mL | 150 pg/mL | 66.67 : 1 | Moderate comparison |
| Example 2 | 15 ng/mL | 120 pg/mL | 125.00 : 1 | Higher progesterone share |
| Example 3 | 25 nmol/L | 500 pmol/L | 54.01 : 1 | Converted unit review |
About this calculator
This calculator compares progesterone with estrogen after unit conversion. Many lab reports list progesterone in ng/mL or nmol/L. Estradiol is often listed in pg/mL or pmol/L. Direct comparison can be confusing because the units are different. This tool converts both values before it creates a ratio. It also shows the inverse ratio, converted hormone values, and a simple percentage share.
Why the ratio matters
Progesterone and estrogen change across the menstrual cycle. They also change with pregnancy, menopause, medicines, and testing method. A ratio can help organize the numbers. It cannot diagnose a condition. It should be reviewed with the lab reference range and a qualified clinician. Serum, saliva, and dried urine tests can give different values. That is why the sample type and cycle day are useful notes.
Formula used
The mass based ratio converts progesterone into pg/mL. One ng/mL equals 1000 pg/mL. Estradiol is also converted into pg/mL. The calculator divides converted progesterone by converted estrogen. The molar ratio uses molecular amounts. Progesterone uses a molecular weight of 314.47 g/mol. Estradiol uses a molecular weight of 272.38 g/mol.
How to use this calculator
Enter the progesterone result from your report. Choose its unit. Enter the estrogen or estradiol result. Choose its unit too. Select the ratio basis and rounding option. Add cycle phase, sample type, and notes if you want a clearer record. Press the calculate button. The result appears below the page heading and above the form. Use the export buttons to save a CSV file or a simple PDF summary.
Reading the result safely
A higher ratio means progesterone is larger relative to estrogen after conversion. A lower ratio means estrogen is larger relative to progesterone. Healthy ranges are not the same for every person. They depend on age, cycle timing, pregnancy status, and treatment. Use this result as an organizing aid, not medical advice. Always compare it with your lab units, reference intervals, symptoms, and professional guidance.
Helpful tracking tips
Keep each result with its date and cycle day. Note supplements, prescriptions, and timing. Repeat testing should use the same method when possible. That makes trends easier to compare. Sudden changes or symptoms deserve timely clinical review before drawing any conclusions safely.
FAQs
What does the progesterone to estrogen ratio show?
It shows how large progesterone is compared with estrogen after unit conversion. It is a comparison tool, not a diagnosis.
Can I use estradiol as the estrogen value?
Yes. Most reports use estradiol for this type of comparison. Enter the estradiol value and choose the unit shown on your report.
Why are unit conversions needed?
Progesterone and estrogen are often reported in different units. Converting them helps create a fair ratio from matching measurement scales.
What is the mass based ratio?
It converts progesterone and estrogen into pg/mL. Then it divides progesterone by estrogen to create the P:E ratio.
What is the molar ratio?
It compares molecular amounts. Progesterone and estradiol are converted into pmol/L before the ratio is calculated.
Can this calculator diagnose hormone imbalance?
No. It only calculates and organizes values. Diagnosis needs symptoms, timing, lab ranges, medical history, and clinical review.
Why does cycle day matter?
Hormone levels change during the cycle. Adding cycle day helps you review the number in better timing context.
Can I save my result?
Yes. After calculation, use the CSV or PDF button to download your result and selected notes.