Age Calculator
Calculate your exact age in years, months, and days, or find the time difference between two dates.
Understanding Age Calculation
Age calculation is a precise way to determine the exact time difference between two dates, typically between a birth date and a calculation date. This calculator helps you find your exact age in years, months, and days.
Birth Date
The birth date is the starting point for age calculation. It represents when a person was born and is used as the reference point for all age-related calculations.
Calculation Date
The calculation date is the end point for age calculation. By default, it's set to today's date, but you can choose any date to calculate age up to that point.
How Age is Calculated
The age calculation takes into account the exact number of days in each month and leap years to provide precise results. The calculation follows these steps:
1. Calculate years by subtracting birth year from calculation year 2. Calculate months by subtracting birth month from calculation month 3. Calculate days by subtracting birth day from calculation day 4. Adjust for negative values in months and days
Examples
Here are some examples of age calculations:
- If born on January 15, 1990, and calculating on March 20, 2024: 34 years, 2 months, and 5 days
- If born on February 29, 2000 (leap year), and calculating on February 28, 2024: 23 years, 11 months, and 30 days
- If born on December 31, 2023, and calculating on January 1, 2024: 0 years, 0 months, and 1 day
Leap Years
Leap years are handled specially in age calculations. A leap year occurs every 4 years, except for years divisible by 100 but not by 400.
A year is a leap year if: 1. It is divisible by 4, AND 2. It is not divisible by 100, OR 3. It is divisible by 400
Limitations
While this calculator provides accurate age calculations, there are some limitations to consider:
- The calculation does not account for timezone differences
- The calculation uses the Gregorian calendar and may not be accurate for dates before its adoption
- The calculation assumes a 24-hour day and does not account for leap seconds