How the Calculator Works?

This tool helps you track your menstrual cycle by predicting key dates based on your input. Here is what you can expect:

Input Your Data: Enter the start date of your last period, your average cycle length, and how long your period typically lasts.

View Key Predictions: Click "Calculate" to see a list of important dates, including your next period start, ovulation day, and fertile window.

Understand Your Cycle: The results are presented in a clear list, and the badge at the top shows how many days remain until your next period starts.

You can adjust the input values and press "Calculate" again to update the predictions. The "Reset" button will restore the example data.

Optimization Tip: You can customize the default values in the input fields (e.g., value="28" for cycle length) and the example date (e.g., value="2026-02-15") directly in the HTML to better suit your needs