Age Calculator
Calculate your exact age in years, months, and days. See your next birthday countdown and milestones.
Enter Dates
Enter your date of birth to see your age
About Age Calculator
This free age calculator determines your exact age from your date of birth to any target date. It computes your age in years, months, and days with precision, accounting for varying month lengths and leap years. Beyond the basic age, it shows detailed statistics including total months, weeks, days, hours, and minutes you have lived.
The calculator also features a next birthday countdown that shows exactly how many months and days remain until your next birthday, along with the day of the week it falls on. It displays the day of the week you were born and calculates upcoming life milestones — such as turning 10,000 days old, 20,000 days old, or reaching significant age thresholds like 50, 75, or 100 years. Past milestones are shown faded so you can see which you've already passed.
Age calculation follows the common convention: if your birth day has already passed in the current month, you count the current month; otherwise, you count up to the previous month and add the remaining days. This matches how people naturally think about age. The tool uses your device's local time and calendar, so results are accurate for any timezone.
FAQ
Q: How does the calculator handle leap years?
A: The calculator correctly accounts for leap years. If you were born on February 29, the tool accurately calculates your age considering that your birthday only occurs on the actual date every 4 years.
Q: Can I calculate the age difference between two dates?
A: Yes! Use the "Date of Birth" field for the starting date and the "Age at Date" field for the ending date. The calculator will show the exact time span between any two dates.
Q: Is the calculation accurate for very old dates?
A: The calculator works with any date supported by your browser's date input. For historical dates, it uses the Gregorian calendar throughout, which may differ from the calendar actually in use before 1582.
Q: Is my date of birth stored anywhere?
A: No. All calculations happen entirely in your browser. No personal data is transmitted or stored on any server.