Age Calculator
Default is today's date
How It Works
This calculator determines your exact age by calculating the difference between your birth date and the selected date (today by default).
It accounts for varying month lengths and leap years to give you precise results in years, months, and days.
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About Age Calculation
How Age is Calculated
Age calculation seems simple, but it involves several considerations:
- Varying month lengths: Months have 28-31 days, affecting day calculations
- Leap years: February has 29 days every 4 years (with exceptions)
- Time zones: Your local date may differ from others around the world
Age in Different Cultures
Different cultures calculate age differently:
Western System
Age starts at 0 at birth and increases by 1 on each birthday.
East Asian Age Reckoning
Traditionally, a baby is considered 1 year old at birth, and everyone ages one year on New Year's Day.
Fun Age Facts
- The average person lives about 27,375 days (75 years)
- Your heart beats about 100,000 times per day
- By age 70, you'll have spent about 23 years sleeping
- Leap year babies (Feb 29) technically only have a birthday every 4 years
- The oldest verified person lived to 122 years old (Jeanne Calment)
Frequently Asked Questions
How do I calculate my exact age?
Enter your birth date and the date you want to calculate your age for (default is today). The calculator will show your exact age in years, months, and days, accounting for varying month lengths and leap years.
Why does my age in days seem higher than expected?
A year has 365 days (366 in leap years), so even at age 30 you've lived about 10,950 days. The calculator counts every single day since your birth, including the extra days from leap years you've experienced.
How are leap year birthdays (February 29) handled?
If you were born on February 29, you technically only have a birthday every 4 years. In non-leap years, most people celebrate on February 28 or March 1. Our calculator accurately accounts for leap years in all age calculations.
What's the difference between chronological age and biological age?
Chronological age is your actual age since birth, which this calculator measures. Biological age refers to how old your body seems based on health markers and can differ from chronological age based on lifestyle factors.