Age Calculator

Calculate your exact age and discover interesting milestones

Calculator is in reset state. Please enter your date of birth to calculate your age.

Your Information

Please enter a valid date of birth
Target date must be after birth date

Your Results

Enter your date of birth to calculate your exact age

The calculator is currently in reset state. Input your birth date to see results.

What is Age?

Age is the time elapsed since birth, measured in years, months, and days.

Why Calculate?

Knowing your exact age helps with planning and celebrating milestones.

Life Expectancy

The global average life expectancy is about 73 years.

How This Tool Works

This age calculator calculates your exact age by comparing your date of birth with either today's date or a specified target date. The calculation accounts for leap years and varying month lengths to provide precise results.

The Age Calculation

Age is calculated by determining the difference between two dates:

Age = Target Date - Birth Date

This calculation accounts for:

  • Leap years: Extra days in February during leap years
  • Month lengths: Varying days in months (28-31 days)
  • Time zones: Optional time zone adjustments

Human Life Stages

Life is typically divided into several stages:

Age Range Stage Characteristics
0-12 years Childhood Rapid growth, learning, development
13-19 years Adolescence Puberty, identity formation, education
20-64 years Adulthood Career, relationships, family building
65+ years Senior Years Retirement, wisdom, legacy building

Interesting Age Facts

  • The oldest verified person lived to 122 years
  • Your body completely regenerates most cells every 7-10 years
  • Children grow faster in spring than other seasons
  • The average person spends about 25 years sleeping
  • Time perception speeds up as we age due to neural processing changes

Time Measurement History

Our modern calendar system has evolved over millennia:

  • 45 BC: Julian calendar introduced by Julius Caesar
  • 1582: Gregorian calendar adopted to fix seasonal drift
  • 1752: Britain and colonies adopted Gregorian calendar
  • 1884: International Meridian Conference established time zones