Age & life stage
Age Calculator
Find your exact age in years, months, and days — plus total days lived and how long until your next birthday.
Age & life stage
Find your exact age in years, months, and days — plus total days lived and how long until your next birthday.
Simple year subtraction ignores whether your birthday has happened yet this year. This tool accounts for that, and also handles varying month lengths and leap years correctly.
We take today's date and your date of birth, then work out the full years, remaining months, and remaining days between them — the same way you'd count on a calendar by hand, just automated. We also total the days between the two dates for a "total days lived" figure, and calculate how many days remain until your next birthday.
Because months have different lengths and leap years add an extra day roughly every four years, a purely mathematical year-based subtraction can be off by a day or two around birthdays. This calculator works from actual calendar dates to avoid that.
Yes. Because the calculation works from real calendar dates rather than assuming every year has exactly 365 days, leap years are handled automatically.
This version calculates age as of today. If you need age as of a specific past or future date — for example, for a form or eligibility check — let us know via the contact page and we may add that option.
No. The calculation happens entirely in your browser and nothing you enter is saved or sent anywhere.