What will your baby be?
Nine prediction methods combined into one answer — from the Chinese calendar to your own gut feeling. No signup, just results.
Lunar age × conception month
Your birth date and due date (or conception date) are converted to the Chinese lunar calendar automatically.
A 700-year-old folk tradition
The chart is not scientifically proven — it is about 50% accurate, the same as a coin flip.
9 methods, one vote
Chinese calendar, Ramzi, nub, heart rate, old wives' tales quiz, baking soda, skull, ring test and your gut feeling.
Only medical answers count
For certainty, NIPT from 10 weeks (99%+) or the 18–20 week scan. Everything here is for entertainment.
How to Use the Gender Predictor
Three easy steps to get your baby gender prediction.
Enter Your Dates
Your birth date and due date are all you need. The tool calculates your lunar age at conception automatically.
Add Optional Methods
Include heart rate, baking soda test results, skull shape observations, or ring test outcomes for a stronger prediction.
Get Your Result
Click predict. See which gender all 9 methods vote for, with a confidence score and breakdown of each method.
The full Chinese gender chart
Based on the ancient Chinese lunar pregnancy calendar. Cross-reference your lunar age at conception with the lunar month.
How to read the Chinese gender chart
Find your lunar age at conception in the left column (Y axis), then move across to the month of conception (X axis). The cell where they meet is the prediction.
The story behind the chart
Legend says the original chart was kept inside the royal palace during the Qing dynasty (1644–1911) and only left it as the dynasty fell, eventually reaching the Beijing Institute of Science. It has loose connections to the I Ching, yin and yang, and the five elements. It relies on two simple principles: the mother's age at conception and the month of conception. No single official version exists — different sites circulate slightly different grids, so if two charts disagree, that's why. One more reason to treat it as a fun tradition rather than a medical test.
How lunar age works
In the Chinese system a baby is considered 1 year old at birth, because the time in the womb counts. Everyone then turns a year older at Chinese New Year rather than on their birthday — so lunar age is usually 1–2 years more than regular age. Example: if your age at conception is 28, your lunar age is 29. The chart itself is the same every year; only how your Gregorian dates convert to lunar months shifts because Lunar New Year falls on a different date each year — in 2026 it is February 17. Our tool adjusts for this automatically.
How accurate is the Chinese gender chart?
The chart claims 50 to 90 percent accuracy depending on the source. In reality, it has about a 50 percent chance of being right, which is the same as guessing. All prediction methods on this page are for entertainment purposes only.
Nine methods, one answer
Each method contributes to the combined prediction. Click any card to explore the science (and myth) behind it.
How Accurate Is Each Method?
Not all prediction methods are equal. Here is what research and data actually show.
| Method | Claimed Accuracy | Real Accuracy | Scientific Evidence | Best For |
|---|---|---|---|---|
| Chinese Calendar | 70-90% | ~50% | None | Fun tradition |
| Ramzi Theory | 97% | Unverified | Not peer-reviewed | Early speculation |
| Nub Theory | 70-90% | 70-90%* | Some informal data | Best non-medical method |
| Heart Rate | N/A | ~50% | Disproven | Not useful |
| Old Wives Tales | N/A | ~50% | None | Baby shower fun |
| Baking Soda Test | N/A | ~50% | None | Kitchen experiment |
| Skull Theory | 70-80% | Unverified | None | Speculation |
| Ring Test | N/A | ~50% | Ideomotor effect | Party trick |
| NIPT Blood Test | 99%+ | 99%+ | Strong | Medical gold standard |
| 20-Week Ultrasound | 95-99% | 95-99% | Strong | Most common method |
* Nub theory accuracy depends on image quality, baby position, and reader experience. Not peer-reviewed. Medical methods (NIPT, ultrasound) are the only proven ways to determine gender.
The classic gender quiz
16 old wives' tales (plus your gut feeling), one answer. These have been passed down for generations. How many point the same way?
Boy or Girl? What Your Symptoms Say
Compare common pregnancy symptoms and what old wives' tales say about each one.
Symptoms Said to Mean Boy
- 💙 Less morning sickness
- 💙 No mood swings
- 💙 Headaches are rare
- 💙 Craving salty and savory foods
- 💙 Cold feet
- 💙 Carrying low
- 💙 Heart rate below 140 bpm
- 💙 Body hair grows faster
- 💙 Skin is drier than usual
Symptoms Said to Mean Girl
- 💗 Severe morning sickness
- 💗 Moody and irritable
- 💗 Frequent headaches
- 💗 Craving sweets and chocolate
- 💗 Carrying high
- 💗 Heart rate above 140 bpm
- 💗 Dull, lifeless hair
- 💗 Oily skin and pimples
- 💗 Weight gain all over, not just the belly
- 💗 Falling asleep on your right side
- 💗 Feet don't grow during pregnancy
All symptom-based predictions are for entertainment. Only medical tests can determine gender accurately.
How is a baby's gender actually determined?
Fun predictors aside, this is what biology really says about boy or girl.
Set at the moment of conception
Every egg carries an X chromosome. Sperm carry either an X or a Y chromosome. If an X sperm wins the race, the baby is a girl (XX). If a Y sperm wins, the baby is a boy (XY). It all happens in the very first moments after fertilization.
The sperm speed myth
You may have heard that Y sperm (boy) swim faster but die sooner, and that X sperm (girl) live longer. While these are popular theories, no reliable study has shown you can meaningfully tip the odds — timing, diet, or positions included.
Only two reliable answers
NIPT blood tests from around 10 weeks are 99%+ accurate. The anatomy ultrasound at 18–20 weeks is 95–99% accurate. Everything else — including every method on this page — is entertainment.
Sources & Further Reading
On the medical standard, Wikipedia explains: “Noninvasive prenatal testing (NIPT) is a method used to determine the risk for the fetus being born with certain chromosomal abnormalities… This testing analyzes small DNA fragments that circulate in the blood of a pregnant woman.” — Noninvasive prenatal testing, Wikipedia
On folklore methods like the ones on this site, Wikipedia notes: “‘Old wives’ tale’ is a colloquial expression referring to spurious or superstitious claims… considered superstition, folklore or unverified claims.” — Old wives’ tale, Wikipedia
On the calendar behind the chart, Wikipedia defines the Chinese calendar as “a lunisolar calendar created by or commonly used by the Chinese people.” — Chinese calendar, Wikipedia
Common questions
More gender prediction methods to explore
Creative Ways to Share the News
Once you know (or have a strong guess!), try one of these memorable reveal ideas.
Balloon Pop
Fill a box with pink or blue balloons and open it together.
Cake Cutting
Bake a cake with pink or blue filling and slice to reveal.
Smoke Bombs
Use colored smoke for dramatic outdoor photos.
Sibling Reveal
Let the older sibling hold a sign or wear a special shirt.
Photo Shoot
Plan a themed photo session to share on social media.
Confetti Cannons
Shoot pink or blue confetti for an instant celebration.
Want more ideas? Read our complete guide