1. What is Weeks Calculation?

The Weeks Calculation determines the number of weeks between two dates. It's commonly used in project planning, pregnancy tracking, academic scheduling, and various time-sensitive applications.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• End Date — The later date in the range
• Start Date — The earlier date in the range
• 7 — Number of days in a week

Explanation: The calculation first determines the total days between dates, then divides by 7 to convert to weeks.

3. Importance of Weeks Calculation

Details: Accurate week calculations are essential for project management, medical tracking (like pregnancy), academic planning, and financial forecasting where weekly metrics are important.

4. Using the Calculator

Tips: Enter valid start and end dates in the format YYYY-MM-DD. The end date should be equal to or later than the start date for meaningful results.

5. Frequently Asked Questions (FAQ)

Q1: Does this include partial weeks?
A: Yes, the calculator shows decimal values for partial weeks (e.g., 3.57 weeks).

Q2: How accurate is this calculation?
A: It's mathematically precise for the given dates, accounting for all calendar days between them.

Q3: Does it account for leap years?
A: Yes, the underlying date difference calculation automatically accounts for leap years.

Q4: Can I calculate weeks in the past?
A: Yes, as long as the end date is equal to or later than the start date, it works for any date range.

Q5: What's the maximum date range this can handle?
A: The calculator can handle any reasonable date range that PHP's DateTime can process (typically years 100-9999).