Find your exact age in years, months, and days. Use our free how old am I calculator to calculate your exact age from your date of birth.
Born on February 29? Your age is still counted in complete years, exactly like anyone else’s. The only quirk is that February 29 does not exist in non-leap years, so birthdays are usually celebrated on February 28 or March 1 instead. This calculator accepts February 29 as a valid birth date and advances your age on March 1 in non-leap years, computing down to the day.
Beyond years, months, and days, the result shows how many total months, total weeks, and total days you have lived. To convert further: multiply total days by 24 for hours, by 1,440 for minutes, and by 86,400 for seconds. These are exact conversions of the day count — the precision stays at the day level.
Many people start their search with "how old am I if I was born in" followed by a specific year. For a quick reference:
These are approximate — for the exact answer to "how old am I if I was born in" a specific year, enter the full date of birth (month, day, and year) into the calculator above for a precise result down to the day.
Simply enter your date of birth in the calculator above — select the month, day, and year you were born — then click Calculate Age. The tool will show your exact age in years, months, and days instantly. No account needed, no data collected.
The calculator shows your age rounded to full years as the primary number. However, for best accuracy, we recommend using the full breakdown (years, months, and days) since a person who is "25" by year count could be anywhere from exactly 25 to nearly 26 depending on their birth month and day.
If you were born on February 29, your birthday is legally recognized as March 1 in non-leap years for most official purposes. Our calculator follows this convention — your age advances on March 1 during non-leap years, giving you a consistent and accurate result every time.
The calculator shows the total number of months you have lived under the "Total" section. For example, if you are 25 years and 6 months old, your total months would be 306. This is calculated by multiplying the years by 12 and adding any remaining months.
The total days since your birth are displayed in the results section. This number accounts for leap years and varying month lengths, giving you the exact count of days from your date of birth to the target date. You can use this number to calculate your age in hours (multiply by 24) or seconds (multiply by 86,400).
To calculate the age difference between two people, use our Age Difference Calculator. It shows the exact gap in years, months, and days between any two dates of birth.
Yes. Our calculator uses precise date-difference algorithms that account for leap years, century leap-year rules (year 2000 was a leap year, 1900 was not), and varying month lengths (28–31 days). The calculation is performed entirely in your browser using the standard JavaScript Date API, which is the same engine used by calendars and date-based applications worldwide.