Use ancient and modern methods to predict your baby's gender. Choose from Chinese Lunar Calendar, Mayan Calendar, or multiple methods combined.
🇨🇳 The Chinese Gender Chart has been used for over 700 years. It uses the mother's lunar age at conception and the Chinese lunar month of conception. Studies suggest ~70% accuracy when lunar dates are correctly applied.
🌙 The Mayan gender prediction method is based on the ages and years involved at conception. If both the mother's age AND the year of conception are even or both are odd → Boy. If one is even and the other odd → Girl.
✨ We'll run all available methods and show you the combined result. The majority prediction wins. Fill in your details to get all predictions at once.
For entertainment only. Only ultrasound and genetic tests determine baby's gender accurately. Consult your doctor for medical advice.
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Chinese Lunar Calendar
A 700-year-old chart from the Qing Dynasty, based on the mother's lunar age and conception month. Studies cite ~70% accuracy.
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Mayan Method
An ancient Mesoamerican prediction based on the parity (odd/even) of the mother's age and year of conception.
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Heart Rate Method
A popular theory: fetal heart rate above 140 BPM is said to suggest a girl; below 140 suggests a boy.
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Combined Prediction
Use all methods together for a majority-rules prediction — multiple data points increase your confidence.
Frequently Asked Questions
How accurate is the Chinese Gender Calendar?▼
Various studies report 50–70% accuracy. The key is using the correct Chinese lunar age and lunar month — errors in date conversion reduce accuracy. This is for fun and should not replace medical gender determination.
What is the Chinese lunar age?▼
In Chinese tradition, babies are considered 1 year old at birth and gain a year on Chinese New Year. Your Chinese lunar age is typically your Western age + 1. We calculate this automatically from your date of birth.
How does the Mayan method work?▼
If both the mother's age at conception and the year of conception are even, or both are odd → predicted Boy. If one is even and the other is odd → predicted Girl. It is a simple but ancient rule of thumb.
When can I find out the real gender?▼
An ultrasound can typically detect baby's sex at 18–20 weeks. NIPT (non-invasive prenatal testing) can detect gender as early as 10 weeks. Always consult your OB/GYN for accurate medical information.
