A fun, traditional prediction based on age and month of conception. For entertainment only.
For fun only. Not a medical or scientific method.
This is folklore, not medicine. Only an ultrasound or genetic test can confirm gender.
Waiting to find out whether a baby will be a boy or a girl is one of the most exciting parts of pregnancy for many families, and long before ultrasounds existed, people around the world came up with all sorts of playful ways to guess. Our Gender Predictor is based on one of the most famous of these traditions, the Chinese Gender Chart, sometimes called the Chinese Lunar Calendar or Chinese Birth Chart.
Enter the mother's age at conception and the month the baby was conceived, and the calculator instantly shows what the traditional chart predicts. It is completely free, fast, and meant purely for fun and curiosity, not as a medical or scientific method.
The Chinese Gender Chart is said to be centuries old, reportedly based on a chart discovered near an imperial tomb in China. It uses two simple pieces of information: the mother's lunar age at the time of conception, and the lunar month of conception. These two values are cross-referenced on a grid to produce a prediction of Boy or Girl.
Because it relies on the lunar calendar rather than the standard Gregorian calendar, the "age" and "month" used in these charts do not always line up exactly with a person's regular birthday and calendar month, which is one reason different versions of the chart, and different online tools, can sometimes give different results for the same person.
Traditional versions of this chart convert the mother's regular (Gregorian) age into a lunar age, which is often roughly one year ahead of the standard age, since lunar age counting can begin from conception rather than birth. That lunar age is then matched against the lunar month of conception on a grid, where each cell has historically been marked to indicate a boy or a girl. Because the chart is a piece of folklore passed down through many versions, small differences between different published charts are common, and no version has a documented, verifiable original source that has been scientifically validated.
If you are not sure of the exact conception month, a good estimate is to count back roughly 2 weeks from the first day of the last menstrual period, or subtract about 38 weeks from the expected due date.
| Tradition | Belief |
|---|---|
| Chinese Gender Chart | Age and conception month predict gender on a lunar grid |
| Belly Shape | A "low" bump means boy, a "high" or "round" bump means girl |
| Heart Rate Myth | A faster fetal heart rate is said to suggest a girl |
| Cravings | Sweet cravings suggest a girl, salty or sour cravings suggest a boy |
| Skin Changes | Extra glow means boy, and skin breakouts mean girl, in folklore |
None of these methods, including the Chinese Gender Chart, have been shown by medical research to reliably predict a baby's biological sex. They persist because they are fun, low-stakes, and part of a long tradition of pregnancy folklore shared between families and generations.
Long before modern medicine, cultures around the world developed their own ways of guessing an unborn baby's sex, often tied to local beliefs about the moon, seasons, or the mother's appearance during pregnancy. The Chinese Gender Chart is one of the best known examples still shared today, alongside similar traditions such as the Mayan gender calendar, which uses the mother's age and the year of conception in a different way. These methods spread widely because they were easy to share by word of mouth, needed no equipment, and turned an uncertain wait into something playful and social.
Biological sex is determined at the moment of conception by whether the sperm carries an X or a Y chromosome. An X-carrying sperm combined with the mother's X egg results in XX (typically female), while a Y-carrying sperm results in XY (typically male). This is a matter of chance at fertilization and is not influenced by age, month, diet, or any of the folklore methods above.
Speak with your doctor or midwife about which options are available, appropriate and recommended for your pregnancy.
Many expecting parents use tools like this one as a lighthearted addition to a gender reveal party or baby shower. A popular idea is to run several different folklore predictors, including this Chinese Gender Chart, a belly-shape guess, and a Mayan gender predictor, and compare the results with guests before revealing the real answer. It adds a fun guessing game to the celebration without anyone taking the predictions too seriously.
Even knowing they are not scientifically reliable, gender prediction charts remain popular at baby showers, gender reveal parties and family gatherings. They add an element of fun and connect expecting parents to generations of tradition, regardless of the accuracy of the result. Many families compare results from several different methods just to see how many agree, purely as entertainment.
Along with gender guessing, many expecting parents naturally start thinking about names, nursery colors, and how to announce the news to family and friends. It can help to remember that whichever way the prediction, or the actual result, turns out, none of these plans need to depend on it. Neutral names, colors and themes are increasingly popular precisely because they work well regardless of the outcome, and they take some of the pressure off predictions like this one.
The Chinese Gender Chart is a fun piece of tradition that has entertained expecting families for generations. Use the predictor above for a playful guess based on age and conception month, enjoy comparing it with other pregnancy folklore, and rely on your doctor's ultrasound or genetic testing for an accurate, medically confirmed answer.