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Chinese gender chart

The traditional chart, looked up by the mother's lunar age and the month of conception. A bit of fun with a long history and no predictive power.

Updated October 2, 2026. Sources listed below.

Roughly two weeks after the first day of your last period.

Or pick the chart row and column directly:

Nothing you enter leaves this page. The result is an estimate for information only, not medical advice.

The full chart

Rows are lunar age, columns are the month of conception. Your lookup is highlighted after you search.

AgeJanFebMarAprMayJunJulAugSepOctNovDec
18 GirlBoyGirlBoyBoyBoyBoyBoyBoyBoyBoyBoy
19 BoyGirlBoyGirlGirlBoyBoyBoyBoyBoyGirlGirl
20 GirlBoyGirlBoyBoyBoyBoyBoyBoyGirlBoyBoy
21 BoyGirlGirlGirlGirlGirlGirlGirlGirlGirlGirlGirl
22 GirlBoyBoyGirlBoyGirlGirlBoyGirlGirlGirlGirl
23 BoyBoyBoyGirlBoyBoyGirlGirlGirlBoyBoyGirl
24 BoyGirlGirlBoyBoyGirlBoyGirlBoyBoyGirlBoy
25 GirlBoyGirlBoyGirlBoyGirlBoyGirlBoyBoyBoy
26 BoyBoyGirlBoyGirlBoyGirlBoyGirlGirlGirlGirl
27 GirlGirlBoyBoyGirlBoyGirlGirlBoyBoyBoyBoy
28 BoyBoyGirlGirlBoyGirlGirlBoyGirlGirlBoyBoy
29 GirlBoyGirlGirlBoyBoyBoyBoyBoyGirlGirlGirl
30 BoyBoyBoyBoyBoyBoyBoyBoyGirlGirlGirlGirl
31 BoyBoyBoyBoyBoyBoyBoyGirlGirlGirlGirlBoy
32 BoyBoyBoyBoyBoyBoyBoyGirlGirlGirlGirlBoy
33 GirlBoyBoyGirlGirlBoyGirlBoyGirlGirlBoyBoy
34 BoyBoyGirlBoyBoyBoyGirlBoyGirlGirlBoyBoy
35 BoyGirlBoyBoyGirlBoyBoyGirlBoyGirlBoyBoy
36 GirlBoyBoyGirlBoyGirlBoyGirlBoyBoyGirlBoy
37 BoyGirlBoyBoyGirlBoyGirlBoyGirlBoyGirlBoy
38 GirlBoyGirlBoyBoyGirlBoyGirlBoyGirlBoyGirl
39 BoyGirlBoyBoyBoyGirlGirlBoyGirlBoyGirlGirl
40 GirlBoyGirlBoyGirlBoyBoyGirlBoyGirlBoyGirl
41 BoyGirlBoyGirlBoyBoyGirlGirlBoyGirlBoyGirl
42 GirlBoyGirlBoyBoyGirlBoyGirlGirlBoyGirlBoy
43 BoyGirlBoyGirlBoyBoyBoyBoyGirlGirlBoyBoy
44 BoyBoyGirlBoyBoyGirlGirlGirlBoyGirlBoyGirl
45 GirlBoyBoyGirlGirlGirlBoyBoyGirlBoyGirlBoy

Where it comes from

The chart is usually said to have been found in a Qing dynasty tomb and is passed around as a legend rather than a document with a traceable origin. It pairs the mother's lunar age with the lunar month of conception to give a boy or girl. It is a tradition, not a method.

When Villamor and colleagues tested it against 2.8 million recorded births in Sweden, the chart matched the actual sex about half the time, which is what you would expect from guessing. We publish it because people ask for it and because it is fun, with that caveat attached.

Sources

Frequently asked questions

Is the Chinese gender chart accurate?

No better than chance. A population-based study of 2.8 million Swedish births (Villamor et al., 2010) found the lunar calendar method predicted the baby's sex correctly about 50% of the time, the same as a coin toss. Treat it as a tradition and a bit of fun.

What is lunar age?

In the traditional Chinese reckoning a baby is one year old at birth and gains a year at each Lunar New Year. A simple approximation, used here, is your age at conception plus one. The exact figure can differ by a year depending on where your birthday and the conception date fall against the Lunar New Year, so try the neighbouring row too.

Which month do I use?

The chart is traditionally read by the lunar month of conception. This tool uses the calendar month as a stand-in, which is what most online versions do. If you know the lunar month, pick it directly.

How can I actually find out the sex?

Through your provider: the anatomy ultrasound usually offered around the middle of pregnancy, or blood tests such as cell-free DNA screening where offered. Only a clinician can give you a reliable answer.

Take it with you

Get Nubbi

Want a guess from your actual scan? Nubbi reads an ultrasound photo taken at 14 weeks or later and returns a boy-or-girl call with a confidence score. For fun and curiosity only.

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About Nubbi

Baby Gender Scanner: Nubbi screenshot