Age Calculator by date of birth

Find out how to calculate Age based on date of birth

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Age Calculator

Date Of Birth


Age at the date of


How to calculate my age

  • To calculate age based on date of birth, enter or select your date of birth in the first box. Click on 'Calculate' to get the age in years, months and days

  • To find the age difference or age on a future date or past date, change the 'age at the date of' to another date.

  • By default, it shows the current date to find the age.

Age Calculator from dob formula

Formula for Age calculator in years (age difference calculator).

time difference = todays date time- date of birth time.

year = time difference/ (24 * 60 * 60 * 1000) / 365.25.

Formula for Age calculator in months.

months = (todays date year - date of birth year) * 12 + (todays date month - date of birth month).