Chinese Calendar Gender Predictor
Enter the mother's birth date and estimated conception date to auto-estimate lunar values, or choose lunar age and lunar month manually.
Tip: If your browser supports Chinese calendar conversion, this tool can estimate lunar age and month automatically.
What Is a Chinese Calendar Gender Calculator?
A Chinese calendar gender calculator (also called a Chinese gender predictor or Chinese birth chart calculator) is a traditional method people use to guess whether a baby may be a boy or a girl. The method uses two values: the mother's lunar age at conception and the lunar month of conception.
Many families use this as a fun tradition during pregnancy. While it is popular online, it should be treated as a cultural prediction game, not a scientific diagnosis.
How to Use This Calculator
Option 1: Automatic estimation from dates
- Enter the mother's date of birth.
- Enter an estimated conception date.
- Click Estimate Lunar Values.
- The tool will try to fill in lunar age and lunar month for you.
Option 2: Manual entry
- Select the mother's lunar age at conception (between 18 and 45).
- Select the lunar conception month (1 to 12).
- Click Calculate Gender Prediction.
How the Prediction Logic Works
This page uses a common online Chinese gender chart rule for quick prediction:
- If lunar age and lunar month have the same parity (both odd or both even), result is Girl.
- If one is odd and the other is even, result is Boy.
Different websites may use slightly different chart variants. That is why results can vary from one calculator to another.
Accuracy and Limitations
There is no strong scientific evidence that Chinese calendar baby gender prediction is medically accurate. Real fetal sex determination uses medical methods such as ultrasound timing and genetic testing under professional care.
Use this tool as a fun conversation starter for baby planning, baby shower games, or family traditions.
Frequently Asked Questions
Is this the same as a medical gender test?
No. This is a traditional predictor and not a clinical method.
Why do I need lunar values?
The classic Chinese gender chart is based on the Chinese lunar calendar system, not the Gregorian calendar.
What if my conception date is only an estimate?
That is normal. Conception date is often approximate, so your result should be interpreted loosely. If your date range spans two lunar months, outcomes may differ.