Due date method
Chinese Gender Predictor by Due Date
Enter the mother's date of birth and an expected due date. LunarBabyStory estimates the conception date, converts the values to the Chinese lunar calendar and applies the traditional chart.
Calculate from expected due date
For this traditional calendar estimate, the calculator counts back 266 days from the expected due date to estimate a conception date. The actual conception date may differ.
How the Due Date Version Works
The main Chinese Gender Predictor uses a known conception date. This version is for people who only have an expected due date. It estimates conception date first, then uses the same deterministic lunar conversion and canonical gender chart as the main predictor.
Why It Is an Estimate
Due dates are pregnancy dating estimates, and individual biology can vary. This tool subtracts 266 days from the expected due date for a simple traditional-calendar estimate only. It does not identify the actual biological conception date.
Know Your Actual Conception Date?
If you know the actual conception date, use the main predictor instead of the due-date version. A known conception date is a more direct input for the traditional chart because lunar month boundaries can fall in the middle of Gregorian months.
Use the Main PredictorFAQ
Is the estimated conception date exact?
No. This calculator subtracts 266 days from the expected due date only as an approximation for the traditional chart lookup.
Should I use this if I know the actual conception date?
Use the main Chinese Gender Predictor if you know the actual conception date, because that avoids the due-date estimate step.
Is this medical advice?
No. This is a folklore and cultural entertainment calculator, not a medical method for determining fetal sex.