Enter a date of birth to get an exact age breakdown.
An age calculator works out the exact time that has passed between a date of birth and today (or any other target date), broken down into years, months, and days rather than just a single number. That level of detail matters more often than people expect — HR teams checking minimum-age eligibility, parents tracking a child's exact age for a school cutoff, or anyone filling out a form that asks for age in years and months rather than a rounded figure.
The calculation itself looks simple but has a few edge cases that trip up manual math: leap years, months of different lengths, and the fact that "years since birth" isn't just today's year minus the birth year if the birthday hasn't happened yet this year. This tool handles all of that automatically, so you get an accurate breakdown without doing calendar arithmetic by hand.
Enter a date of birth in the input field, and the tool immediately calculates the age as of today's date. The result shows the full breakdown in years, months, and days, along with the total number of days lived, which is useful for milestone tracking (turning 10,000 days old, for example) or for medical and legal forms that ask for age in different units.
Yes. The date math is based on actual calendar dates, so leap years are automatically factored into the day and month counts — you don't need to adjust anything manually.
The tool defaults to calculating age as of the current date, which covers the vast majority of use cases like forms and eligibility checks.
Months vary in length (28 to 31 days), so a true month-based breakdown is more accurate than dividing total days by a flat 30. This is why the calculator counts full calendar months rather than estimating.
Yes — common uses include verifying age eligibility for school enrollment, contests, or legal requirements, and calculating exact ages for medical dosage charts that are based on age in months rather than years.
No. The calculation runs entirely in your browser using JavaScript — your date of birth is never transmitted to a server or stored.