Use this global period calculator tool to accurately predict and track your menstrual cycle dates.
Global Period Calculator
How to Use the Calculator
To use the calculator, simply:
- Select the Start Date from the calendar.
- Select the End Date from the calendar.
- Click on the Calculate button.
- View the calculated period in days in the Result field.
How it Calculates the Results
The calculator works by subtracting the Start Date from the End Date and converting the difference from milliseconds to days. The result shows the total number of days between the two dates selected.
Limitations of the Calculator
The calculator does not account for:
- Timezone differences.
- Date exclusions (public holidays, leap seconds).
- Partial days since it rounds up to the nearest whole day.