Age Calculator
Calculate exact age in years, months, and days from a birth date.
Age
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Usage examples
Calculating exact age
Enter a birth date to instantly see the exact age today, broken down into years, months, and days.
Calculating age as of a specific date
Find out how old someone was on a specific date, like a graduation or contract signing, by changing the as-of date.
Checking how many days until the next birthday
With just a birth date, also see exactly how many days remain until the next birthday.
Frequently asked questions
Is the date I enter sent to a server?
No. All calculation happens entirely in your browser, and the dates you enter are never sent to a server.
Does this support traditional age-counting systems used in some countries?
No. This tool only calculates age using the international standard method based on birth date.
If someone was born on February 29, when is their birthday in a non-leap year?
Since February 29 doesn't exist in a non-leap year, February 28 is used as the birthday that year by convention.
Can I calculate age as of a date other than today?
Yes. Change the as-of date field to any date you want, and the age is recalculated relative to that date.