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Age Calculator (Western, Chinese & Lunar)
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Enter your birth date to instantly calculate your exact age, traditional Chinese age, and total days alive, plus find your Chinese zodiac, horoscope, and lunar birthday.
The reference date defaults to today; you can freely switch it to view age at any moment.
Usage Tips
Exact Age
Born on 1990-01-15, calculated up to 2026-07-18.
Chinese Age (Xusui)
38
Traditional algorithm: 1 year old at birth, adds 1 year with each Chinese New Year.
Total Days Lived
13,333
Approx. 1904 Weeks
Total Months Lived
438
Born On (Day of Week)
Monday
Gregorian Date: 1990-01-15
Date
2027-01-15
Friday
Countdown
181
days away
184 days have passed since this birthday
Chinese Zodiac
Zodiac Sign
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A child born on New Year's Day in 2000 has lived for over 9,000 days by now. If you want to know exactly "how long you've been alive," this calculator is for you. Actual age (chronological age) is the internationally recognized standard, based on your Gregorian birthday, where you age one year after each birthday. Nominal age (Xu Sui) is the traditional Chinese way of calculating age, based on the Lunar New Year. You are considered 1 year old at birth, and you gain a year every Lunar New Year (Spring Festival). For example, a baby born on New Year's Eve is considered 2 nominal years old the very next day on Lunar New Year's Day. The Chinese Zodiac also follows the lunar calendar, with the Spring Festival as the dividing line, not January 1st. Horoscopes (astrological signs), on the other hand, are divided by Gregorian dates, such as Aries falling between March 21 and April 19. With this calculator, simply enter a birth date, and the system will instantly calculate your actual age, nominal age, total days lived, countdown to your next birthday, lunar birthday, Chinese Zodiac sign, and horoscope, saving you the trouble of manually checking a perpetual calendar.
Assuming today is June 1, 2026, let's enter a Gregorian birthday: May 15, 1990. Action: Enter "1990-05-15" in the date box, select "Gregorian" for the date type, and click "Calculate." The results will show:
In this example, the actual age and nominal age differ by 1 year because the birth date is after the Spring Festival.
If you are trying to calculate your Chinese age, remember that the Chinese lunar age (虚岁, nominal age) is usually 1–2 years higher than your Western age. A Chinese lunar age calculator counts you as 1 year old at birth and adds a year at each Lunar New Year, while Western age starts at 0 and increases on your Gregorian birthday. So your lunar age depends on how many Spring Festivals you have lived through, not how many full years have passed.
Q: How do I calculate my Chinese age?
A: Enter your birth date above and read the “Nominal age” result. The tool automatically adds 1 year for birth and 1 year for each Lunar New Year you have passed, so you don’t need to count Spring Festivals yourself.
Q: Why is my Chinese lunar age 1 or 2 years older than my real age?
A: Because nominal age starts at 1 (not 0) and increases at the Lunar New Year. If you were born shortly before Spring Festival, you can be 2 nominal years old while only days old in Western terms.
Q: Does this work as a Chinese lunar birthday calculator?
A: Yes. Switch the input to “Lunar”, or enter a Gregorian date to see the matching lunar birthday, zodiac animal and star sign instantly.
