Age Calculator — How old am I?
Calculate your exact age in years, days, hours and seconds. Zodiac sign, Chinese zodiac, days until your next birthday and life milestones.
Optional — affects the precise countdown
Age Calculator — How old am I exactly?
Enter your date of birth (and optionally the time) to instantly see your exact age down to the second. The precise counter updates live every second.
What the calculator shows
Age by calendar — the familiar “years and days” format that we use in everyday speech. This does not depend on your birth time.
Precise age — accounts for your birth time. If you were born at 11:00 PM and the clock now reads 10:00 AM, that day hasn’t fully elapsed yet. The ticking counter shows years, days, hours, minutes and seconds.
Total lived — the cumulative count of days, weeks, hours, minutes and seconds since you were born. The seconds figure is particularly striking.
Birthday info
- Day of week — which day of the week you were born on
- Zodiac sign — Western astrology based on your birth date
- Chinese zodiac — your sign in the Chinese lunar year cycle (approximate — does not account for the exact Chinese New Year date)
- Until next birthday — how many days until your next birthday
- Season of birth — Winter, Spring, Summer or Autumn
- Day of year — the ordinal number of your birthday within the year (1 to 365/366)
Milestones
Next round birthday — the nearest milestone age: 5, 10, 13, 16, 18, 20, 21, 25, 30 years and every 5 years after that.
1 billion seconds — a rare personal landmark: 10⁹ seconds equals approximately 31 years and 8 months. Many people celebrate this as a quirky milestone. The calculator shows the exact date — past or future.
Frequently asked questions
Why enter a birth time?
If you were born at 11:30 PM and the current time is noon the next day, technically that full day hasn’t elapsed yet. Without a birth time the calculator counts from midnight, which can overcount by one day. With the exact time, the counter reflects the actual elapsed duration.
How accurate is the Chinese zodiac?
The Chinese zodiac sign is based on the birth year, but the boundary actually falls on the Chinese New Year — usually somewhere between January 20 and February 20. If you were born in January or February, your sign may differ. For a precise determination, look up the exact start date of your lunar year.
What is “day of year”?
It’s the ordinal number of your birthday counting from January 1st. For example, May 15 is the 135th day of a common year (or the 136th in a leap year). A fun detail for people who enjoy unusual date facts.
Is my data sent anywhere?
No. Your date and time of birth are never transmitted to any server.