Age Calculator
Calculate your exact age in years, months, and days — plus your next birthday and the day you were born.
Enter your date of birth
Leave blank for today's date, or pick a future/past date
How It Works
The calculator computes the difference between your date of birth and today (or your chosen target date) in complete years, months, and remaining days. It also shows your age in total days, weeks, and hours. The day of the week for your birth date is computed using a calendar algorithm. Your next birthday date and countdown are derived from the current year.
Frequently Asked Questions
How is age calculated exactly?
Age in complete years is determined by counting how many full birthdays have passed since your date of birth. Months and days are then counted from your last birthday. This calculator handles leap years correctly.
What day of the week was I born on?
The calculator shows the day of the week for your date of birth — Monday through Sunday. It uses the standard calendar algorithm to determine this for any date in history.
When is my next birthday?
The calculator shows the date of your next birthday, how many days until it arrives, and which day of the week it falls on. Handy for planning.
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