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Calculate your exact age in years, months, and days, plus total days lived and your next birthday countdown.
Age Calculation:
Age = Current Date - Birth Date
The calculator accounts for leap years and varying month lengths to give a precise result.
Age is calculated by subtracting the birth date from today's date, accounting for the exact number of days in each month and leap years.
Your birthday is counted when the current date matches your birth month and day. If born on Feb 29, your birthday falls on Mar 1 in non-leap years.
Total days lived is the absolute difference in milliseconds between today and your birthdate, divided by 86,400,000 (ms per day), rounded down.
The next birthday is calculated by setting the current year's birthday date. If that date has already passed this year, it adds one year.
The calculator uses your local device date. For maximum precision, run it on your actual birthday at local midnight.
Yes. Simply enter their birthdate in the date field. The calculator works for any past date up to today.