Period & Ovulation Calculator

📄 Content Summary

1. Purpose of the Page
This calculator helps you predict when your next menstrual period will start and also shows your ovulation day and fertile window based on your cycle information — which helps with cycle awareness, family planning, or personal tracking.

2. Main Inputs
To use the tool, you usually enter:

First day of your last period (start date of bleeding)

Cycle length in days (like 28 days typical)

Duration of your period in days

3. What It Calculates
After you enter the details and click the button, the tool shows:

Estimated date your next period starts

Ovulation day

Fertile window (days when you are most likely to conceive)

4. How It Works (General Explanation)
Although the exact calculator formula isn’t shown, this kind of period calculator usually:

Adds your average cycle length to your last period start date to estimate the next period start date

Estimates ovulation roughly 14 days before your next expected period

Shows fertile days around ovulation, because sperm can survive up to ~5 days and the egg about 12-24 hours after release

5. Educational Sections on the Page
Below the calculator, the site includes informational sections like:

How to use the period calculator with step-by-step instructions

Description of menstrual cycle phases (menstrual, follicular, ovulation, luteal)

Explanation of the fertile window (best days for conception)

FAQs about menstrual cycles and prediction limitations

6. Health & Accuracy Notes
The page notes that results are estimates, and real cycles can vary monthly due to stress, lifestyle, or biological factors. It’s not meant as a medical tool or replacement for professional advice.