Explore whether you're expecting a boy or girl with the traditional Chinese lunar calendar chart. A cherished cultural tradition loved by millions of expecting parents worldwide.
Chart Prediction
Girl • Lunar Month 5
Enter your dates below for instant automated lunar age conversion and gender prediction.
The Chinese Gender Predictor (also known as the Chinese Gender Calendar or Birth Chart) is a traditional forecasting method originating from Chinese lunar calendar customs. It cross-references the mother's Chinese lunar age at conception against the lunar month of conception to predict whether a baby will be a boy or a girl. While popular for fun during pregnancy planning, it is a cultural practice rather than a medical diagnostic tool.
Our automated calculator converts your Western dates into traditional Chinese lunar units in four simple steps.
Enter mother's Gregorian birth date to determine baseline Western age.
Adds +1 year (gestational count) and adjusts for Chinese New Year shifts.
Converts conception or due date into the Chinese lunar month (1–12).
Intersects Lunar Age (row) x Lunar Month (column) for your result.
Understanding the two core parameters required by the traditional Chinese lunar chart matrix.
In traditional Chinese customs, a child is considered 1 year old at birth, counting time spent in the womb as the first year of life. To look up your result on the historical chart, your Western age at conception must be increased by 1 year (with additional adjustments if born in January or February before Chinese New Year).
The traditional chart relies on the Chinese lunar calendar month (1 through 12) rather than the Western Gregorian month. Because lunar months follow moon phases and run about 10 days shorter than solar years, our tool converts your estimated conception date automatically.
Mother's Birth Date: June 15, 1995 — Conception Date: March 10, 2026
Western age at conception = 30 years old
Chinese lunar age = 30 + 1 = 31 (Row 31 in the chart grid)
💡 Note: If born before Chinese New Year, an additional lunar year offset is calculated automatically.
Scroll right on mobile → | Rows = Lunar Age | Columns = Lunar Month
| Lunar Age | Month 1 (Jan–Feb) | Month 2 (Feb–Mar) | Month 3 (Mar–Apr) | Month 4 (Apr–May) | Month 5 (May–Jun) | Month 6 (Jun–Jul) | Month 7 (Jul–Aug) | Month 8 (Aug–Sep) | Month 9 (Sep–Oct) | Month 10 (Oct–Nov) | Month 11 (Nov–Dec) | Month 12 (Dec–Jan) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18 | G | B | G | B | G | B | G | B | G | B | G | B |
| 19 | B | G | B | G | B | G | B | G | B | G | B | G |
| 20 | G | B | G | B | G | B | G | B | G | B | G | B |
| 21 | B | G | B | G | B | G | B | G | B | G | B | G |
| 22 | G | B | G | B | G | B | G | B | G | B | G | B |
| 23 | B | G | B | G | B | G | B | G | B | G | B | G |
| 24 | G | B | G | B | G | B | G | B | G | B | G | B |
| 25 | B | G | B | G | B | G | B | G | B | G | B | G |
| 26 | G | B | G | B | G | B | G | B | G | B | G | B |
| 27 | B | G | B | G | B | G | B | G | B | G | B | G |
| 28 | G | B | G | B | G | B | G | B | G | B | G | B |
| 29 | B | G | B | G | B | G | B | G | B | G | B | G |
| 30 | G | B | G | B | G | B | G | B | G | B | G | B |
| 31 | B | G | B | G | B | G | B | G | B | G | B | G |
| 32 | G | B | G | B | G | B | G | B | G | B | G | B |
| 33 | B | G | B | G | B | G | B | G | B | G | B | G |
| 34 | G | B | G | B | G | B | G | B | G | B | G | B |
| 35 | B | G | B | G | B | G | B | G | B | G | B | G |
| 36 | G | B | G | B | G | B | G | B | G | B | G | B |
| 37 | B | G | B | G | B | G | B | G | B | G | B | G |
| 38 | G | B | G | B | G | B | G | B | G | B | G | B |
| 39 | B | G | B | G | B | G | B | G | B | G | B | G |
| 40 | G | B | G | B | G | B | G | B | G | B | G | B |
| 41 | B | G | B | G | B | G | B | G | B | G | B | G |
| 42 | G | B | G | B | G | B | G | B | G | B | G | B |
| 43 | B | G | B | G | B | G | B | G | B | G | B | G |
| 44 | G | B | G | B | G | B | G | B | G | B | G | B |
| 45 | B | G | B | G | B | G | B | G | B | G | B | G |
The Chinese Gender Chart is built upon traditional Chinese lunar calendar principles that map maternal lunar age against conception month. Documented public circulation of the chart grid emerged in the late 20th century across popular parenting media.
Popular origin stories associate the chart with China's Qing Dynasty imperial court, claiming the original chart was buried in a royal tomb near Beijing to preserve royal lineage forecasting secrets.
While these stories contribute to the chart's cultural appeal, historians have found no verified archaeological records or Qing Dynasty manuscripts documenting a 700-year-old tomb discovery. The origin remains an unverified cultural legend.
A transparent look at scientific research versus traditional folklore.
A comprehensive 2010 Canadian study published in the Journal of Obstetrics and Gynaecology Canada evaluated the Chinese gender chart against 2.8 million real birth records over a 38-year period. The study concluded that the chart's predictive accuracy was approximately 50% — exactly the same as flipping a coin.
Because human baby gender is determined purely by chromosome inheritance (X or Y sperm from the father), maternal age and lunar month have no biological influence on baby gender.
Comparing traditional prediction methods with clinical medical procedures.
| Feature | Chinese Predictor | NIPT Cell-Free DNA | Anatomy Ultrasound |
|---|---|---|---|
| Primary Purpose | Cultural Tradition / Fun | Chromosomal Screening | Anatomical Development |
| Earliest Timing | Pre-conception / Anytime | 10 Weeks Gestation | 18–22 Weeks Gestation |
| Clinical Accuracy | ~50% (Coin Toss) | >99% Accurate | 95–99% Accurate |
| Method | Lunar Chart Lookup | Maternal Blood Draw | Sonogram Imaging |
| Medical Use | None (Entertainment) | Clinical Diagnostic | Clinical Anatomy Assessment |
Parents guessing baby gender together — a cherished tradition
Independent research indicates the Chinese gender predictor operates at roughly 50% accuracy — the same as random chance. A 2010 study published in the Journal of Obstetrics and Gynaecology Canada evaluated the chart against 2.8 million real birth records over 38 years and found no statistically significant predictive value. Baby sex is determined solely by whether an X- or Y-carrying sperm fertilizes the egg — a biological event unrelated to the mother's age or the lunar calendar month.
Add 1 to your Western age at the time of conception. This reflects the traditional Chinese custom of counting gestation as the first year of life. An additional adjustment applies if you were born in January or February before Chinese New Year in your birth year — in that case, add 2 instead. Our calculator handles both adjustments automatically.
Yes, using IVF Mode in the calculator. The key is to enter the estimated egg retrieval date — not the embryo transfer date — as the conception date. For a Day 5 (blastocyst) transfer, subtract 5 days from your transfer date to get retrieval. For a Day 3 transfer, subtract 3 days. The lunar chart then cross-references your maternal lunar age at retrieval against the corresponding lunar month.
The Chinese gender chart is a traditional lunar calendar grid that maps the mother's Chinese lunar age at the time of conception (rows 18–45) against the Chinese lunar month of conception (columns 1–12). Popular folklore attributes its origins to ancient Chinese court records, though historians have not found verified archaeological evidence for these stories. The chart is used today as a cultural tradition and entertainment tool, not a medical diagnostic.
The Chinese lunar calendar follows the phases of the moon. A lunar year runs approximately 10–11 days shorter than a Gregorian solar year, so Chinese New Year falls on a different Gregorian date each year (between January 21 and February 20). The current lunar month rarely aligns exactly with a Gregorian calendar month, which is why our calculator converts your Gregorian conception date into the corresponding lunar month rather than simply using the month number.
You can use your Last Menstrual Period (LMP) date instead. Conception typically occurs approximately 14 days after the start of your last period for a standard 28-day cycle. Alternatively, enter your estimated due date and the calculator will count back 280 days to estimate your conception window. Both methods introduce a small margin of uncertainty in the lunar month calculation.
Three common sources of discrepancy: (1) some calculators use the mother's Western age rather than Chinese lunar age, skipping the +1 adjustment and Chinese New Year correction; (2) some use the Gregorian month number as the lunar month rather than converting; (3) others apply Chinese New Year offsets inconsistently. Our calculator performs all three conversions automatically.
The traditional chart matrix was structured for singleton pregnancies. Our Twins Mode lets you enter two separate conception dates and generates a prediction for each, but the historical grid does not specify separate logic for fraternal versus identical twins. Treat twin results as two independent cultural tradition lookups, not a clinical assessment.
Yes, typically — because your lunar age and the lunar conception month will differ between pregnancies. Each calculation is completely independent. Your previous children and pregnancy history have no effect on the result.
This tool is provided for cultural interest and entertainment purposes only. It should never be used as a substitute for professional medical advice, fetal ultrasound scans, or clinical chromosomal diagnostic testing. Always consult your healthcare provider for clinical medical assessments.
Essential resources for understanding and using the traditional Chinese lunar gender prediction system accurately.
Full interactive lunar calendar with year-of-birth rows and lunar month columns for 2026–2027 conceptions.
Step-by-step explanation of the +1 gestational year rule and Chinese New Year offset corrections.
Egg retrieval date vs. transfer date — which date to use when applying the chart after IVF.
~50% predictive accuracy confirmed across 38 years of Canadian birth records. Full peer-reviewed study review.
Side-by-side comparison of the Chinese lunar chart and placenta-side Ramzi gender prediction method.
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