π Age Calculator
Find out exactly how old you are β in years, months, and days. Answers the classic question: "How old am I?"
π How Does the Age Calculator Work?
This tool calculates the exact difference between two dates: your date of birth and an optional "as of date" (defaults to today). It accounts for:
- Leap years (February 29)
- Different month lengths (28, 29, 30, 31 days)
- Precise year, month, and day difference
The result shows your age in years, months, and days. For example, if you were born on June 15, 1990, and today is June 2, 2026, you would be 35 years, 11 months, and 18 days old.
π― Why Use This Age Calculator?
- Accurate β handles calendar complexities automatically.
- Flexible β calculate age at any past or future date.
- Fast β instant results as you change dates.
- Privacy friendly β all calculations done in your browser, no data sent to any server.
Perfect for legal documents, birthday planning, retirement calculations, school projects, or simple curiosity.
π Age Calculation Formula
The algorithm computes the difference by first calculating the year difference, then adjusting for months and days:
- Subtract birth year from asβof year to get initial years.
- If the current month is less than birth month, subtract one year and adjust months.
- If month is equal but day is less, similarly adjust.
- Days are calculated by subtracting birth day from the day in the adjusted month, accounting for month lengths and leap years.
This method gives the true calendar age, not just a rough dayβcount divided by 365.
π‘ Did you know?
The total days lived includes all days from birth date to the asβof date (excluding the birth date if counting age). For example, someone born on January 1, 2000, has lived exactly 365 days on January 1, 2001 (age 1).