Age Calculator
Your Age
Age Calculation Examples
| Birthday | Calculate On | Result |
|---|---|---|
| 2000-01-01 | 2025-01-01 | 25 years old |
| 1990-05-15 | 2025-06-17 | 35 years, 1 month, 2 days |
| 2010-12-31 | 2025-01-01 | 14 years, 0 months, 1 day |
| 2005-02-28 | 2025-02-28 | 20 years old |
Understanding Age Calculations
Age calculations can vary based on different calendar systems and leap year considerations. Here are some key points to remember:
- Leap Years: Years divisible by 4 are leap years, except for century years which must be divisible by 400
- Month Lengths: Months have 28-31 days (April, June, September, November have 30; February has 28 or 29)
- Date Formats: Our calculator uses ISO 8601 format (YYYY-MM-DD)
- Exact Age: The calculator considers the exact date of birth and the target date to calculate precise age
Age Calculation Tips
Consider these tips for accurate age calculations:
- The age is calculated based on the Gregorian calendar
- If your birthday hasn't occurred yet this year, one year is subtracted from the calculation
- Age can be expressed in multiple formats (years, months, days)
- Leap years affect age calculations for people born on February 29
- Time zones do not affect age calculations as we consider dates only
Common Age Calculations
Some frequently used age calculations:
- Legal adulthood: 18 years old in many countries
- Retirement age: Typically 65-70 years old depending on country
- Driving age: Usually 16-18 years old
- College eligibility: Generally 18 years old
- Childhood: Up to 12 years old