Exactly how old are you? Enter a birth date and get your age in years, months, and days — plus live-ticking totals, a countdown to your next birthday, the day you were born, zodiac signs, and your next 1,000-day milestone.
"How old are you?" sounds like the easiest question in the world — until you need the exact answer. Forms want your age as of a cutoff date. Parents count a baby's age in weeks, then months, then suddenly years. Somebody at dinner insists they're "still 39" and you'd like the receipts. This calculator gives the precise, calendar-correct answer: your age in full years, months, and days, live totals down to the ticking second, and the countdown to your next birthday.
The years/months/days figure uses the standard civil convention: count full years to your most recent birthday,
then full months, then leftover days. Because months have different lengths, "1 month" always means the same
calendar day in the next month — so someone born January 31 turns one month old on February 28 (or 29), not on a
fixed 30-day mark. Leap-day babies: your birthday is counted on February 29 when it exists and rolls
to March 1 in common years, which is the convention most jurisdictions use.
A birth date is a key piece of personal identity — it's used in verification everywhere. This calculator does all of its math in your browser: the date you type is never uploaded, logged, or stored on any server. If you allow it, the page remembers your inputs locally on your own device so it's instant next visit — and that's the only place they live.
Enter your date of birth and the calculator instantly shows your precise age broken into years, months, and days, plus live-ticking totals in weeks, days, hours, minutes, and seconds. It handles leap years and month lengths correctly, which is where mental math usually goes wrong.
The calculator shows your total age in days the moment you enter your birth date, and the number keeps ticking live. It also shows the totals in weeks, hours, and seconds for the full existential effect.
Enter your date of birth and the calculator tells you the exact weekday you were born, along with your western zodiac sign and a countdown to your next birthday.
Yes. Set any target date and the calculator computes the exact age on that day, which is exactly what school cutoffs, visa forms, and eligibility rules ask for.
Completely free with no sign-up, and the calculation happens in your browser. Your birth date is never sent to a server or stored anywhere.