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Age Calculator

Calculate your exact age in years, months, days, hours, and more

Enter Your Birth Date

Select your date of birth
Leave blank to calculate current age

Age Milestones

Teenager 13-19 years
Adult 18+ years
Quarter century 25 years
Over the hill 40 years
Golden years 65+ years
Centenarian 100+ years

About Age Calculation

How It Works

Age is calculated by finding the difference between your birth date and the target date (today by default). The calculation accounts for leap years and varying month lengths.

Calculation Method

  • Years are counted from birthday to birthday
  • Months account for different lengths (28-31 days)
  • Leap years are automatically handled
  • Time zones use your local system time

Fun Facts

  • You age continuously, not just on birthdays
  • Age in days shows the exact time you've been alive
  • Your age in seconds is constantly increasing
  • Leap years add an extra day every 4 years

Uses

  • Calculate precise age for legal documents
  • Find out exact days until your next birthday
  • Determine age for retirement planning
  • Calculate age as of a specific historical date