Age Calculator - Full Age, Zodiac and Star Sign
Exact age / Chinese zodiac / star sign / birthday countdown
What is an age calculator
The age calculator works out your exact full age (X years X months X days), total days lived and a countdown to your next birthday, and also derives your Chinese zodiac animal (switching precisely at the Start of Spring) and your star sign (by Gregorian date). Full age increases at each Gregorian birthday while the traditional Chinese age increases at each Lunar New Year, so the two usually differ by one to two years. To measure the full stretch of time from birth to today, try thedays lived calculator.
Age calculator FAQ
How is full age (周岁) calculated?
Full age counts from your date of birth and increases by one on each Gregorian birthday. This tool shows it precisely as X years X months X days, the internationally used way to state age.
How does the traditional Chinese age (虚岁) work?
The traditional Chinese age counts you as one year old at birth and adds a year at each Lunar New Year, so it is usually one to two years higher than your full age. This tool shows both the exact full age and the zodiac and star sign for your birth date.
Is the Chinese zodiac determined by the lunar year or Spring Festival?
It switches at the Start of Spring (立春), not at the first day of the first lunar month. For example, someone born before 4 February 2024 is a Rabbit, while someone born after is a Dragon. This tool applies the Start-of-Spring rule automatically.
Is my star sign based on the lunar or the solar calendar?
Star signs follow the solar (Gregorian) date and have nothing to do with the lunar calendar. Enter your Gregorian birth date to get your sign. If you only know your lunar birthday, convert it to a solar date first.
Is my data safe?
Yes. Every calculation runs locally in your browser and the birth date you enter is never uploaded to a server.
How do I work out my age in years, months and days?
Enter your Gregorian birth date and the tool computes your exact full age against today, shown as X years X months X days, together with total days lived and a countdown to your next birthday.
How do I calculate how many days I have lived?
Count the actual days from your birth date to today. This tool shows the total directly, giving you a sense of your progress through life.
How long until my next birthday?
The tool compares your birth month and day with today and shows a live countdown in days to your next birthday.