Enter your birth date to see your age
Calculate your exact age and related information.
Exact age instantly
The Age Calculator turns a birth date into an exact age — years, months, and days — using real calendar arithmetic, not day-count approximations. It also shows the totals (days, weeks, months, hours lived), counts down to the next birthday, and lets you set any target date, so you can compute an age as of a form's deadline, a school cut-off, or a date in the past. Dates are handled in your local timezone, and Feb-29 birthdays are correctly celebrated on Feb 28 in non-leap years. Everything runs in your browser.
By real calendar arithmetic: the calculator subtracts the birth date from the target date year-by-year, month-by-month, and day-by-day, borrowing from the previous month or year exactly the way a human would — using each month's true length. It never divides a day count by 30 or 365, which is how approximate calculators drift.
Yes. The target-date field defaults to today but accepts any date — set it to a school admission cut-off, an application deadline, or a historical date, and the tool reports the exact age on that day, plus the same totals.
In non-leap years the next-birthday countdown treats the birthday as February 28 — the common civil convention — rather than silently rolling it over to March 1. In leap years the true February 29 date is used.
No. The calculator runs 100% in your browser — the dates you enter are processed locally and never sent to a server, stored, or tracked.
Yes — free, no sign-up, no limits, like every tool on this site.