1. What is Age Calculation?

Age calculation determines the time elapsed between a birth date and a current date, typically expressed in years, months, and days. It accounts for varying month lengths and leap years to provide precise duration measurements.

2. How Does the Calculator Work?

The calculator uses PHP's DateTime functions to compute the exact difference between two dates:

Where:

• Birth Date — The starting date (date of birth)
• Current Date — The ending date (today or any specified date)
• Age — The difference expressed in years, months, and days

Explanation: The calculation accounts for all calendar variations including leap years and different month lengths to provide an exact duration.

3. Importance of Accurate Age Calculation

Details: Precise age calculation is essential for medical applications, legal documents, school enrollments, retirement planning, and any scenario where exact age matters.

4. Using the Calculator

Tips: Enter the birth date and current date (defaults to today). The calculator will show the exact age in years, months, and days, plus the total days.

5. Frequently Asked Questions (FAQ)

Q1: How does the calculator handle leap years?
A: It automatically accounts for leap years in the calculation, including February 29th dates.

Q2: What if the birth date is after the current date?
A: The calculator will show an error as age cannot be negative.

Q3: Does it account for different month lengths?
A: Yes, it correctly handles months with 28-31 days.

Q4: Can I calculate age as of a past date?
A: Yes, enter any past date as the "current date" to see age at that time.

Q5: How precise is the calculation?
A: It's exact down to the day, accounting for all calendar variations.