Age Calculator
Find your exact age in years, months, and days from your date of birth, plus total days lived and your next birthday countdown.
Calculate your age
Your Age
Total Days
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Total Hours
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Total Weeks
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Total Months
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More details
How Age is Calculated
Your age in years is the number of complete years that have elapsed since your date of birth. After the years, the remaining months and days are counted. This is how official documents (passports, legal forms) calculate age.
Leap Year Birthdays
If you were born on 29 February, your birthday on non-leap years is typically counted as 28 February or 1 March depending on local convention. This calculator uses the date as entered.
Frequently Asked Questions
Age is the difference between your date of birth and today's date, measured in complete years, then remaining months, then remaining days.
Multiply your age in years by 365.25 (to account for leap years) and add the days in the current partial year. This calculator computes the exact count.
Your next birthday is the next occurrence of your birth month and day. If it has already occurred this year, the next one is next year.
The calculator determines the day of the week of your birth date using the date's timestamp.