Chinese Gender Chart & Calendar – Predict Boy or Girl

The Chinese gender prediction chart is a 700-year-old calendar that claims to predict whether you are having a boy or girl based on two numbers: the mother's lunar age at conception and the lunar month of conception.

How the Chart Works

The original chart was discovered in a royal tomb near Beijing. It uses a grid where each row represents the mother's lunar age (18 to 45) and each column represents the lunar month of conception (1 to 12). The intersecting cell tells you "Boy" or "Girl."

How to Calculate Lunar Age

In the Chinese lunar system, a person is considered age 1 at birth. Your lunar age is typically your current age plus 1. Our online predictor calculates this automatically.

How Accurate Is It?

Despite claims of 70-90% accuracy, independent analysis shows the Chinese gender chart is about 50% accurate — the same as random chance. It remains popular because it is fun, free, and part of cultural tradition.

Full 2026 Chinese Gender Calendar

How to Read the Chinese Gender Chart

The chart works like a multiplication table. Find your lunar age in the left column, then trace across to the column representing your lunar month of conception. The intersecting cell will say either "Boy" or "Girl."

Example

If your lunar age at conception was 28 and you conceived in lunar month 3 (roughly March/April), the chart predicts a Boy. Try different ages and months to see how the prediction changes.

Chinese Calendar vs Other Methods

Unlike ultrasound-based methods like nub theory or Ramzi theory, the Chinese gender chart requires no medical imaging. You only need two numbers. This makes it accessible to anyone, anywhere, at any stage of pregnancy — even before your first prenatal appointment.

However, unlike medically validated methods such as NIPT (99%+ accurate) or the 20-week anatomy scan (95-99% accurate), the Chinese chart has no scientific evidence supporting its predictions.

History and Origins

The Chinese gender prediction chart is said to be over 700 years old, discovered in a royal tomb near Beijing during the Qing Dynasty. According to legend, the original chart was used by the imperial family to predict the gender of heirs. Today, it remains one of the most popular gender prediction tools worldwide.

Frequently Asked Questions

Why does the Chinese calendar use lunar age?

In the traditional Chinese lunar calendar system, a person is considered age 1 at birth (counting time in the womb). Your lunar age is typically your Western age plus 1. For example, if you are 28 by Western reckoning, your lunar age would be 29.

Does the Chinese calendar work for twins?

No. The Chinese gender chart was designed for single pregnancies only. There is no way to predict the genders of twins or multiples using this method.

Can I use the chart before conception?

Some people use the chart in reverse — picking a lunar month that predicts their desired gender and trying to conceive in that month. There is no evidence this works, but it adds to the fun and cultural tradition.

The chart covers mothers aged 18-45 and all 12 lunar months. For the complete interactive table where you can cross-reference any age with any month, use our full calendar tool.