Age Calculator
Find your exact age in years, months, and days plus total days lived and days until your next birthday.
Enter your date of birth using the date picker. The calculator compares it to today's date and instantly shows your exact age broken into years, months, and days.
Below the age breakdown you will see the total number of days you have lived and the number of days remaining until your next birthday. All date math is done with UTC timestamps to avoid daylight saving time shifts.
The tool is useful for verifying age for forms, planning birthday events, or simply checking long-term milestones. No data leaves your browser.
Frequently asked questions
How is exact age calculated?
The calculator subtracts the birth date from today's date, accounting for the day of month and month boundaries so that February 29 and leap years are handled consistently.
Why is the total days value sometimes different from years times 365?
A year is about 365.25 days on average because of leap years. The total days lived includes every leap day between the two dates, so it is the precise calendar day count.
Can I use a future date?
The calculator expects a birth date in the past. If a future date is entered, no result is shown because age cannot be computed from a future birth date.