Discover Your Exact Age
Enter your date of birth and current date to find your exact age, total time lived, and your next birthday.
Age Calculator
Your Exact Age
Age Result
Total Time
Totals are based on the calendar-day difference between your dates and don't account for your exact birth time unless you enter one.
Next Birthday
Your Next Birthday
Your Age in Fun Numbers
What Is an Age Calculator?
An age calculator is a tool that works out exactly how much time has passed between two dates — typically your date of birth and today. Instead of a rough year count, it breaks the result down into years, months and days, plus totals in weeks, hours, minutes and seconds.
How Does the Age Calculator Work?
You enter your date of birth and a current date (today by default). The tool then compares the two dates using calendar-based arithmetic, so it correctly handles things like different month lengths and leap years rather than just dividing by 365.
How Age Is Calculated
The calculator starts from your birth year, month and day, then counts forward to the current date. If the day-of-month in the current date is earlier than your birth day, it borrows a month; if the month is earlier, it borrows a year. This keeps the result accurate no matter where your birthday falls in the calendar, including February 29 in leap years.
How to Calculate Age in Years, Months and Days
Manually, you'd count full years between the two dates, then count the remaining full months, then the remaining days. This tool automates that process instantly and also shows the equivalent totals in months, weeks, days, hours, minutes and seconds.
Frequently Asked Questions
How do I calculate my exact age?
Enter your date of birth and the date you want to calculate against, then select Calculate My Age. The tool returns your age in years, months and days.
Can I calculate my age in months?
Yes. The Total Time section shows your complete age converted into total months, alongside weeks, days, hours, minutes and seconds.
How many days have I lived?
The Total Days figure and the Fun Numbers section both show the exact number of days between your date of birth and the selected current date.
Can I calculate my next birthday?
Yes. The Next Birthday card shows the date of your upcoming birthday, how many days remain, the age you'll turn, and a live countdown.
Does the calculator account for leap years?
Yes. The calculation uses real calendar dates, so leap years and February 29 birthdays are handled correctly.
Is the age calculator free?
Yes, it's completely free to use, runs entirely in your browser, and doesn't store or send your dates anywhere.