Chinese Gender Calculator
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The Chinese gender chart is a centuries-old folk table that predicts a baby’s sex from the mother’s lunar age and the lunar month of conception. It is fun to try, but studies show it is right about half the time, the same as guessing.
| Lunar age | 33 |
| Lunar month of conception | 3 |
| Prediction | Girl |
| Your row of the chart (month: sex) | 1:♀ 2:♂ 3:♀ 4:♂ 5:♀ 6:♀ 7:♀ 8:♂ 9:♀ 10:♀ 11:♀ 12:♂ |
Show steps
- Lunar (nominal) age: Chinese counting starts at 1 at birth and adds a year at each Chinese New Year. Approximation: lunar year of conception 2026 − birth year 1994 + 1 = 33. If the mother was born in January or early February, before that year's Chinese New Year, add 1.
- Lunar month: Chinese New Year of 2026 was 2026-02-17. Counting lunar months of about 29.53 days from it, the conception falls in lunar month 3 (leap months are ignored, so dates near a month boundary are uncertain).
- Chart: row for lunar age 33, column for month 3: girl.
How the chart works
- Find the mother’s lunar age at conception: Chinese age counting starts at 1 at birth and adds a year at Chinese New Year.
- Find the lunar month of conception, counting months from Chinese New Year.
- Read the box where the row and column meet: boy or girl.
Is it accurate?
No. A study of about 2.8 million births in Sweden (Villamor et al., 2010) found the chart predicted the sex correctly about 50% of the time. Since roughly half of babies are boys, a coin flip does just as well.
The math of a 50% guess
If a method is right with probability 1/2, getting two pregnancies right in a row happens 1/4 of the time and three in a row 1/8 of the time. Stories of the chart “working every time” are what chance predicts for some families.
Chinese Gender Calculator quiz: 10 questions
Test yourself with 10 multiple-choice questions. Choose an answer and press Submit to see if you are right and why. Your score appears at the end.
Quiz complete
Frequently asked questions
How accurate is the Chinese gender chart?
About 50% in large studies, the same as guessing.
How do I find my lunar age?
Add 1 to the year difference between the conception year and your birth year. If you were born, or conceived, before Chinese New Year in January or February, adjust by a year.
Why is the lunar month approximate?
Chinese months follow the moon and some years have a leap month; the calculator estimates from Chinese New Year.
Is it the same as the baby gender predictor?
The baby gender predictor uses other folk tales; both are just for fun.
When can a doctor tell the sex?
A prenatal blood test can from about 10 weeks, and an ultrasound usually around 18 to 22 weeks.
Sources
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