Enter your date of birth below to see your exact age in years, months, and days, plus your total age in weeks, days, and hours. The calculation happens instantly, no sign-up needed.
Enter Your Date of Birth
How This Age Calculator Works
Enter your date of birth, and optionally change the second date if you want to know your age on a specific past or future date instead of today. The calculator instantly shows your exact age broken down into years, months, and days, along with your total age in months, weeks, days, and hours, how many days remain until your next birthday, and which day of the week you were born on.
This tool works entirely in your browser, so it can also be used to calculate the age of a child, a pet, a document, or any other date-based duration by simply entering the relevant dates.
Why Your Exact Age Matters
Knowing your exact age down to the day is useful for more than curiosity. Many official forms, applications, and eligibility checks ask for an exact age rather than just a birth year, and small mistakes in date math are easy to make by hand, especially around leap years and month lengths.
- Legal and administrative forms. Some applications require your age calculated to a specific reference date.
- Age milestones. Finding out exactly how many days old you are, or how many days remain until a milestone birthday.
- General curiosity. Comparing ages between people, or checking someone's day of the week of birth.
Frequently Asked Questions
Is this age calculator free to use?
Yes, completely free with no limit on how many times you can use it, and no account is required.
Can I calculate my age on a date other than today?
Yes, change the second date field to any date, past or future, and the calculator will show your age as of that date.
Does this account for leap years?
Yes, the calculation is based on actual calendar dates, so leap years and different month lengths are automatically handled correctly.
Can I use this to calculate the age of something other than a person?
Yes, since the calculator simply works out the time between two dates, you can use it for a pet's age, the age of a document, or the time since any event.