Lunar Age Calculator

Lunar age is calculated using the traditional Chinese lunisolar calendar, which differs from the Gregorian (Western) calendar. In the Chinese system, a baby is considered one year old at birth because the time spent in the womb is counted. Additionally, everyone gains a year on Chinese New Year rather than on their individual birthday, which means most people are one or two years older in the lunar system.

There are two main reasons. First, Chinese tradition counts the approximately nine months spent in the womb, so a newborn starts at age one. Second, age increases on Chinese New Year (usually late January or February) for everyone simultaneously, rather than on each person's own birthday.

Your lunar age is generally your Gregorian age plus one year for the womb period, and then an additional year if Chinese New Year has already passed in the current calendar year after your birth. The result is typically one or two years higher than your standard Western age.

The Chinese zodiac is a 12-year cycle where each year is associated with an animal sign (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig). Your zodiac sign is determined by your birth year in the Chinese lunar calendar. It repeats every 12 years and is closely tied to the lunar calendar used to calculate your lunar age.

This calculator uses the standard method of adding one year for the womb period and checking whether Chinese New Year has occurred in the current year relative to your birth date. It provides a close approximation of your traditional Chinese lunar age. For ceremonial or official purposes in Chinese culture, you may wish to consult a detailed lunisolar calendar.

Not exactly. While China, Korea, and Vietnam all have traditional age-counting systems based on the lunar calendar, there are slight differences. Korea uses a very similar system (called 'Korean age'), while Vietnam's system also adds one year at birth. The specifics can vary by region and tradition.

In the traditional Chinese system, everyone's lunar age increases by one on Chinese New Year, which falls between late January and mid-February each year. This is different from the Western practice of aging up only on your personal birthday.

Yes. If Chinese New Year has not yet occurred in the current year at the time of calculation, your lunar age will be exactly one year more than your Gregorian age. If Chinese New Year has already passed, it will be two years more. The difference oscillates between one and two years depending on the time of year.