Age Calculator
Calculate your exact age in years, months, and days from your date of birth, and see how long until your next birthday.
How this calculator works
Enter your date of birth and this tool calculates your exact age in complete years, months, and days as of today, along with the date of your next birthday and how many days remain until it.
Why not just subtract years?
Simply subtracting birth year from the current year ignores whether your birthday has happened yet this year, and gives no month/day detail. This calculator accounts for the exact day, including correctly borrowing days across months of different lengths and handling leap years.
Leap year birthdays
If you were born on 29 February, your birthday only exists in leap years. In other years, this calculator shows your next birthday as 28 February, which is the common convention, and correctly switches back to 29 February in the next leap year.
This tool runs entirely in your browser. Nothing you enter is uploaded or stored.
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