1. What is Age Calculation?

Age calculation determines how much time has passed between a date of birth and a current date. It's commonly used in medical, legal, and personal contexts to determine precise age in years, months, and days.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• Current Date — The reference date for age calculation
• Date of Birth — The birth date of the individual
• 365.25 — Accounts for leap years (average days per year)

Explanation: The calculation accounts for the exact number of days between two dates and converts this to years using the average length of a year including leap years.

3. Importance of Accurate Age Calculation

Details: Precise age calculation is crucial for medical dosing, legal age verification, school enrollment, retirement planning, and various official documentation requirements.

4. Using the Calculator

Tips: Enter the date of birth and optionally change the current date (defaults to today). The calculator will display age in years, months, days, and decimal years.

5. Frequently Asked Questions (FAQ)

Q1: Why use 365.25 days per year?
A: This accounts for leap years, making the calculation more accurate over long periods.

Q2: How precise is this calculation?
A: It's accurate to the day, accounting for varying month lengths and leap years.

Q3: Does it work for future dates?
A: Yes, but will return negative values if the current date is before the birth date.

Q4: What's the maximum age it can calculate?
A: There's no practical limit, but extremely old dates may have calendar system considerations.

Q5: Why show both exact and decimal age?
A: Different contexts require different formats - exact for legal, decimal for medical/scientific.