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👶 Ancient Lunar Calendar · Boy or Girl Prediction Chart
Chinese Gender Predictor
Predict your baby's gender using the traditional Chinese Baby Gender Chart. Convert your Gregorian birth date and conception date into Chinese Lunar values instantly.
How It Works
- 1Enter the mother's Gregorian date of birth.
- 2Select the estimated month and year of conception.
- 3The calculator converts dates to Chinese Lunar values.
- 4It queries the ancient grid to predict Boy or Girl.
The Lunar Formula
Lunar Age = Conception Year - Birth Year + 1
Lunar Month ≈ Gregorian Conception Month
The traditional chart matches the mother's lunar age (18 to 45) and conception month (1 to 12) to forecast the gender.
Scientific Disclaimer
There is no scientific basis for lunar calendar gender prediction. Gender is determined at the moment of conception by the father's sperm (carrying either an X or Y chromosome). This tool is built entirely for fun and planning curiosity.
Origin of the Chinese Gender Chart
According to Chinese folklore, the chart was created over 700 years ago and was buried in a royal tomb to preserve its secrecy. It uses the Yin and Yang principles, along with the Five Elements (Metal, Water, Wood, Fire, and Earth), to calculate the likelihood of conceiving a male or female child based on seasonal cycles and parental lunar cycles.
Last reviewed: June 2026. For medical gender screening or testing options, always consult your ob-gyn or primary care physician.
Predictor Planning Tips
- 1Use this tool purely as a fun, traditional forecasting game during pregnancy planning
- 2Calculate your lunar age carefully — in Chinese culture, you are considered one year old at birth
- 3Determine the exact month of conception, which may differ from the month of your last menstrual period (LMP)
- 4Zodiac signs and lunar predictions are based on the Chinese lunisolar calendar, not standard Western astrology
- 5Always rely on clinical ultrasounds or NIPT blood tests conducted by qualified doctors for medical gender confirmation
Frequently Asked Questions
How accurate is the Chinese Gender Predictor?
The Chinese Gender Predictor is not scientifically proven and should be used strictly for fun and educational planning. While some anecdotal reports suggest success rates up to 50–70%, scientific studies of lunar calendar prediction charts show no statistically significant difference from a standard 50/50 random chance (similar to a coin toss).
How is Chinese Lunar Age calculated?
In the traditional Chinese age system, a baby is considered 1 year old at birth (accounting for time in the womb). Additionally, your age increases by 1 year at every Chinese New Year, rather than on your Gregorian birthday. The simplified formula used by most online tools is: Lunar Age = (Conception Year - Birth Year) + 1.
What is the origin of the Chinese Baby Gender Chart?
Legend states that the chart was discovered in a royal tomb near Beijing over 700 years ago, or developed during the Qing Dynasty to help royal families select and plan for male heirs. Today, the original chart is preserved at the Beijing Institute of Science and is a popular cultural tradition worldwide.
Should I use this tool to make medical decisions?
No. The Chinese Gender Predictor is purely for entertainment. For accurate baby gender determination, consult a healthcare provider for medical procedures like an obstetric ultrasound (typically from week 18–20 of pregnancy), non-invasive prenatal testing (NIPT) blood tests, or chorionic villus sampling (CVS).
Related Guides & Articles
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Chinese Gender Predictor Chart Guide: Origin, Accuracy, and Lunar Calendar Math
Learn how the ancient Chinese Baby Gender Predictor chart works, how to calculate your lunar age, and the history behind this popular pregnancy planning tradition.
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How Pregnancy Due Dates Are Calculated — and Why Yours May Shift
Learn the medical formulas used to calculate your pregnancy due date, including Naegele's Rule, and understand why your actual delivery date might shift.