The Chinese Gender Chart (also called the Chinese gender calendar or birth chart) is said to have been discovered in a royal tomb near Beijing. It cross-references two things: the mother's Chinese lunar age at conception and the lunar month the baby was conceived. Find the row for the age and the column for the month, and the cell predicts pink or blue.
Our calculator estimates your lunar age from your birth date (the Chinese tradition counts you as one year old at birth, so it's typically about a year higher than your Western age) and uses your conception month against the published chart. It's an approximation of the lunar calendar — treat it as a game.
Not really. Large surveys put the chart's accuracy right around 50% — the same odds as flipping a coin. A baby's sex is set at conception by chromosomes, and no chart can change or truly predict that. People love it because it's a fun, low-stakes tradition, not because it works. For a real answer, an ultrasound around 18–20 weeks or a NIPT blood test from about 10 weeks is the way to know.
When you're ready to actually find out — and make a moment of it — a live reveal beats a chart. With Revealcast, guests cast a real pink-or-blue guess from one link and the answer plays on the big screen for the whole room at once, including family joining from far away. Browse the reveal themes, try our old wives' tale gender quiz, or estimate your date with the due date calculator.
Studies put the Chinese Gender Chart's accuracy at about 50% — the same as a coin flip. A baby's sex is determined by chromosomes at conception, so no calendar can actually predict or influence it. It's a fun tradition, not a diagnosis. An ultrasound around 18–20 weeks or a NIPT blood test from about 10 weeks are the reliable ways to know.
Two things: the mother's Chinese lunar age at conception and the lunar month the baby was conceived. Our calculator estimates the lunar age from the mother's birth date (the tradition counts a newborn as one year old, so it runs about a year above the Western age) and uses your conception month against the published chart.
In the Chinese tradition, you're considered one year old at birth and gain a year at each Lunar New Year rather than on your birthday. In practice that makes the Chinese lunar age roughly one year higher than your Western age — which is the number the chart uses.
Yes — it's completely free and just for fun. When you want to turn the guessing into a real reveal your whole party can play, that's what Revealcast is for.