Chinese Gender Calendar 2026 — Chart & Calculator

The Chinese gender calendar maps your lunar age at conception and the lunar month you conceived to a boy-or-girl prediction using a centuries-old chart. It is a beloved cultural tradition — with an honest ~50% accuracy. Try the instant calculator below, then read on to understand exactly how it works.

Chinese gender calculator

Two dates. One instant guess.

Please fill in both dates to get your prediction.

What is the Chinese gender calendar?

The Chinese gender calendar is a centuries-old chart that crosses a mother's lunar age at conception against the lunar month she conceived to predict whether she is having a boy or a girl. Legend says the original was discovered in a royal tomb near Beijing and is roughly 700 years old — though historians note that the specific origin story keeps changing, so treat it as folklore rather than documented fact.

Mechanically the chart is a table. One axis lists the mother's lunar age (roughly 18 to 45). The other axis lists the lunar conception month (1 through 12). You find the row for your age, follow it to the column for your month, and read the single cell — "Boy" or "Girl." That one cell is the entire prediction.

Notice what the chart does not use: the father's age, genetics, health, or anything from an actual ultrasound. Two inputs, one guess. That simplicity is both the charm and the limitation.

How to convert your dates: lunar age and lunar month

The whole method lives or dies on converting your real-world dates into lunar ones. People who say "the chart was wrong for me" have very often just used the wrong inputs.

Lunar age

In the traditional Chinese counting system a baby is considered one year old at birth, and everyone gains a year at the lunar new year rather than on their personal birthday. In practice that usually means taking your Western age at conception and adding about one year, with a small extra adjustment depending on whether you had your birthday before or after the most recent lunar new year.

Example: if you are 28 years old in the Gregorian calendar at conception and the lunar new year has already passed that calendar year, your lunar age is likely 29. If the lunar new year has not happened yet, it may be 30 — the exact nudge depends on the lunar calendar for that specific year.

This is the number people most often get wrong, and getting it wrong by a single year sends you to the wrong row of the chart entirely.

Lunar conception month

The Chinese lunar calendar does not line up with January–December. Lunar New Year falls somewhere in late January or February each year, and each lunar month follows the moon's cycle rather than a fixed Western date. So "I conceived in March" does not cleanly map to "lunar month 3."

For 2026 specifically: the Lunar New Year falls on 17 February 2026, beginning the Year of the Horse. Conceptions from 17 February onward map to lunar months starting from month 1 of the new lunar year. Conceptions before that date still sit in the previous lunar year's months.

Because both conversions are easy to fumble, doing them by hand is the single biggest source of "it didn't work" complaints. The calculator above handles all of this for you automatically.

The 2026 Chinese gender chart — sample readings

Reading the chart is straightforward once your two numbers are correct: find your lunar age row, slide across to your lunar conception month column, and read the cell. Here is an illustrative slice of how the grid looks — these are the traditional chart values, not medically verified outcomes:

Lunar age at conception Lunar month 1 Lunar month 2 Lunar month 4 Lunar month 6 Lunar month 8 Lunar month 10 Lunar month 12
22GirlBoyBoyGirlBoyGirlGirl
25GirlGirlBoyGirlBoyBoyGirl
28BoyGirlGirlBoyGirlBoyBoy
30BoyBoyGirlBoyGirlGirlBoy
31BoyGirlBoyGirlGirlBoyGirl
33GirlBoyGirlBoyBoyGirlBoy
34GirlGirlBoyBoyBoyGirlBoy
38BoyGirlBoyGirlBoyBoyGirl

The "2026" in Chinese gender chart 2026 matters only for the conversion step: it tells you which lunar new-year date to use when turning this year's conception date into a lunar month. The pattern of the grid itself does not change year to year — only your inputs do.

For a full interactive 12-column version of the chart, use the calculator at the top of this page — it converts your dates and looks up the exact cell for you.

How accurate is the Chinese gender calendar?

~50%

Here is the part most chart pages leave out. The largest rigorous test of the Chinese gender calendar looked at 2,840,755 singleton births in Sweden and compared each chart prediction against the actual recorded sex of the baby (Villamor, Dekker, Svensson & Cnattingius, 2010). The verdict was blunt: the calendar was correct approximately 50% of the time, with a result so close to random that the authors concluded it performs no better than tossing a coin.

That result is not a knock against the tradition — it is just honesty. With only two inputs (neither of which has any biological link to sex) there is no mechanism by which the chart could beat chance. When it is right, it is right for the same reason a coin lands heads.

Why it still "feels" accurate

If it is a coin flip, why do so many people swear by it? A few very human reasons:

  • It is right half the time by design. Every correct hit feels like confirmation; every miss gets quietly forgotten.
  • Confirmation bias. Once the chart says "boy," you start noticing everything that fits.
  • Survivorship in the stories. People who got a "correct" result are far more likely to post about it online.

None of that changes the underlying odds. For a deeper look at why a chance-level method can feel uncanny, see our piece on Chinese gender calendar accuracy.

Chinese calendar vs other prediction methods

How does the Chinese calendar stack up against other folk methods — and against a real ultrasound?

Method What it uses Accuracy Best for
Chinese gender calendar Lunar age + lunar conception month ~50% Fun cultural tradition, early in pregnancy
Nub theory Angle of genital tubercle at 12–13 weeks ~70% First trimester scan, clear side profile
Ramzi theory Placenta placement at 6–8 weeks ~55% Very early scan curiosity
Skull theory Skull shape on scan ~55% 12-week profile image
Anatomy scan (ultrasound) Direct visualization of genitalia >95% 18–20 weeks, the gold standard

For a side-by-side breakdown of all methods, visit our methods compared guide.

Common mistakes when reading the chart

  • Using your Western age instead of lunar age — this puts you on the wrong row, and the chart cannot correct for it.
  • Using the calendar month of conception instead of the lunar month — wrong column, wrong result.
  • Guessing the conception date. Conception typically happens a couple of weeks after your last period, not the same day. Even being off by a week can shift the lunar month.
  • Treating different online charts as identical. Several versions circulate with minor variations. Stick to one consistent source (like the calculator above) for a stable result.
  • Treating the result as a fact. The chart cannot see your baby. It is a tradition, not a test.

Curious how this stacks up against other folk methods like heart rate, carrying high or low, and the ring test? Our methods compared overview lines them all up side by side.

How BabyPeek does it

In the BabyPeek app, the Chinese calendar is one playful signal among several — never the answer on its own. The app runs the Chinese calendar alongside Nub, Ramzi, Skull, and a live read of your first-trimester scan, then shows a majority verdict with an honest confidence level. You get the fun of the tradition without being misled by it.

Download on theApp Store

Frequently asked questions

It is a traditional grid that crosses your lunar age at conception against the lunar month you conceived and returns a boy-or-girl guess. It is a fun cultural tradition, not a medical test. The "2026" refers to using the correct lunar calendar conversions for this year — the grid pattern itself does not change annually.
About 50%. A population study of 2.84 million births (Villamor 2010) found it predicts sex no better than tossing a coin. It is a 700-year-old tradition that is fun to try, but it has no biological mechanism that could beat chance.
Start with your Western age at conception and generally add about one year, since the lunar calendar counts a baby as one at birth and everyone gains a year at the lunar new year. You may need a small additional adjustment depending on whether the lunar new year has already passed for the current calendar year. The calculator above handles this automatically.
Yes. The calculator at the top of this page does all the lunar conversions for you — you only enter your birth date and conception date and get the chart's guess instantly. No lunar math required.
No. Treat it as entertainment. The chart cannot see your baby and has no biological connection to sex. Only your doctor's anatomy scan — typically at 18–20 weeks — can confirm your baby's sex.
Several versions of the chart circulate online, and many skip the lunar conversion entirely (using Western ages and calendar months instead). This creates inconsistent results. The calculator above converts dates properly and uses a consistent chart, so your result is stable across repeat visits.
The Chinese lunar calendar does not align with the Gregorian January–December months. Each lunar month follows the moon's cycle, and the year begins at Lunar New Year (17 February 2026 for the 2026 lunar year). You need to convert your conception date into the corresponding lunar month — the calculator does this for you.

Sources

  • Villamor E, Dekker L, Svensson T, Cnattingius S. "Validity of the Chinese birth calendar for predicting fetal sex." Paediatric and Perinatal Epidemiology, 2010. n=2,840,755 Swedish singleton births; accuracy ~50%.

For entertainment only. This is not medical advice — confirm your baby's sex with your doctor's anatomy scan.