Age Calculator

Age is calculated by finding the difference between your birth date and today's date. The calculator accounts for leap years and varying month lengths to give you precise years, months, and days.

This calculator shows your total days lived. It multiplies years by 365, adds days for leap years, and accounts for the exact number of days in each month since your birth.

Use the 'Calculate Age On' field to enter any date instead of today. This lets you find out how old you were or will be on any particular date.

The calculator shows both Western zodiac (based on birth month/day) and Chinese zodiac (based on birth year). These are traditional astrological systems and are provided for fun and cultural interest.

Enter any birth date and change the 'Calculate Age On' date to your target date. The calculator will show the exact age difference in years, months, and days between any two dates.

To find your age in weeks, divide your total days by 7. Our calculator shows total days lived, which you can convert. For example, 10,000 days = about 1,428 weeks or 27.4 years.

Chronological age is your actual age since birth (what this calculator shows). Biological age reflects your body's health compared to typical aging. You might be 50 chronologically but have the health of a 40-year-old (biological age 40).