Tool 03 · For fun
Boy
or girl?
The Qing dynasty chart, with a real lunisolar conversion behind it. It is folklore and it is right about half the time, which is exactly what you would expect from a grid that only has two answers in it.
The chart says
- Your lunar age
- Lunar month
- Year animal
- Element
This is a coin flip with decoration on it. The chart is a 336 cell grid of two answers and no mechanism. The only things that actually tell you are NIPT from 10 weeks, or the anatomy scan at 18 to 20 weeks.
The working
All 336 cells
The whole chart
Lunar age down the side, lunar month of conception across the top. 164 cells say boy and 172 say girl. Your cell is outlined once you have run it above.
Why most versions of this online are wrong
The chart takes two inputs and both of them are lunar: your Chinese lunar age, and the lunar month you conceived in. The Chinese calendar is lunisolar, so its new year moves between late January and late February, and its months do not line up with Gregorian months at all.
Most versions online skip the conversion and feed the chart your ordinary age and the ordinary month number. That is wrong for anyone who conceived in January or early February, because those dates belong to the previous lunar year, and it is wrong by a month for a large part of the rest of the year. A conception on 1 February 2026 falls in the twelfth lunar month of 2025, not the second month of 2026.
This one does the conversion properly, over a lunisolar table that runs from 1900 to 2100 and is checked against the published Chinese New Year date of every year in that range plus the festival dates that sit mid year. It will still be wrong about half the time, but it will be wrong for the honest reason.
Chinese lunar age
In Chinese reckoning you are one year old at birth and gain a year at each lunar new year rather than on your birthday. So someone born in January can be two years older in lunar reckoning than in Gregorian reckoning. That is why this tool asks for your birth date rather than your age.
What actually tells you
NIPT, a blood test from 10 weeks, reports sex chromosomes as a side effect of screening for chromosomal conditions, and it is highly accurate. The anatomy scan at 18 to 20 weeks is a direct look and is accurate when the baby cooperates. Everything else, including this chart, the ring test, the bump shape and the heart rate, is entertainment.
Sex prediction is not a reason to make a medical decision. If you want to know, ask for NIPT or wait for the scan.