How old am I?
Enter your date of birth for your exact age in years, months and days — plus the weekday you were born and how long until your next birthday.
Enter your date of birth to see your exact age in years, months and days.
How old is someone born in…
Pick a birth year to see both possible ages in 2026, the generation and milestone birthdays.
How your age is counted
We count whole years since your date of birth, then whole calendar months, then the days left over. When a month is shorter than your birthday's date — say you were born on the 31st — that month is complete on its last day.
Born on February 29? In leap years your birthday is February 29. In other years we count it on March 1, the day you complete another full year; some people prefer to celebrate on February 28.
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Frequently asked questions
How is my exact age calculated?
Whole years first, then whole calendar months, then the remaining days, all counted from your date of birth to today in your time zone. The days-alive figure is the plain number of days between the two dates.
I was born on February 29 — when is my birthday?
In leap years it's February 29. In other years this calculator counts it on March 1, the first day on which you've completed another full year, and shows your next birthday on that date.
Is my date of birth sent anywhere?
No. The calculation happens in your browser. The date is kept only in the page address after the # sign, which browsers don't send to websites, so you can bookmark or share the result without us seeing it.