Chinese Gender Predictor
Enter the mother's age and conception month to get the traditional Chinese gender prediction.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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The Chinese gender prediction chart is a folk tradition dating back centuries. It predicts whether a baby will be a boy or girl based on the mother's age and the month of conception. Here is how to use it:
- Enter the mother's age at the time of conception (not at the due date or birth). Use a whole number between 18 and 45.
- Select the month of conception. If you are unsure, use the month that was approximately 9 months before the due date, or work backward from your last menstrual period.
- Read the prediction. The chart returns either Boy or Girl based on the corresponding cell in the traditional chart.
This is purely for fun. The chart has no scientific validity and predicts accurately roughly 50% of the time, which is the same as a coin flip. It is a popular conversation starter and gender reveal party activity. For medically accurate fetal sex determination, ask your OB about a NIPT blood test (as early as 10 weeks) or ultrasound (typically 18-20 weeks).
About the Chinese Gender Chart
The Chinese gender prediction chart is said to be based on the ancient I Ching (Book of Changes) and was reportedly discovered in a royal tomb near Beijing approximately 700 years ago. The original chart is based on the mother's lunar age and the lunar month of conception, not the Gregorian calendar. This calculator uses a simplified version based on Gregorian age and month, which is the most commonly referenced version online. Studies on the chart's accuracy consistently find it performs no better than random chance at predicting fetal sex.
Frequently Asked Questions
How accurate is the Chinese gender prediction chart?
Multiple scientific studies have evaluated the Chinese gender chart and found its accuracy to be approximately 50%, which is no better than random chance. A 2010 study published in the journal Paediatric and Perinatal Epidemiology specifically tested the chart against birth records and found no predictive value. It is a fun cultural tradition, but should not be used for any decision-making. Ultrasound and NIPT tests are the only medically validated methods for determining fetal sex.
Does the Chinese gender chart use lunar age?
The original traditional chart is based on the mother's Chinese lunar age and the lunar month of conception. Chinese lunar age is calculated differently from Western age: a person is considered 1 year old at birth and gains a year at the start of each Chinese New Year rather than on their birthday. The lunar conception month also differs from the Gregorian month. This simplified calculator uses standard (Gregorian) age and month for convenience, which is how most Western versions of the chart are presented.
When can I find out my baby's sex through medical testing?
Non-Invasive Prenatal Testing (NIPT) can detect fetal sex chromosomes as early as 10 weeks of pregnancy with high accuracy (over 99%). A standard anatomy ultrasound at 18-20 weeks can visually confirm fetal sex, though the accuracy depends on fetal position and the sonographer's experience. Some providers offer early gender ultrasounds at 14-16 weeks. Ask your OB which option is appropriate for your pregnancy.
What age should I use in the Chinese gender chart?
Use the mother's age at the time of conception, not the current age or the age at the due date. If you conceived in October and turned 30 in December, use 29 as your age. For the most precise traditional version, you would convert to your Chinese lunar age (add 1 to your Western age and adjust for the Chinese New Year), but for the simplified Gregorian version used here, your standard age at conception is sufficient.