How to calculate to have a baby boy in 2025
– Calculate the ages of both the husband and the wife (this is also known as the method of predicting a baby’s gender based on the mother’s age).
– Use the Chinese lunar calendar (also known as the Chinese gender chart) to determine conception timing.
– Plan conception according to the mother’s age and the desired month to increase the chances of having a boy.
These are the three most popular methods shared widely on online forums and communities, praised for their high accuracy. Below, Feng Shui astrology introduces in detail how to calculate and plan for conceiving a baby boy according to your wishes.
1. Giving birth to a boy or a girl as desired based on the age of WIFE + HUSBAND
The method of calculating the birth of a boy or a girl as desired based on the birth year of the parents has been applied by many people for a long time and has been widely circulated in Oriental medicine and ancient studies.
According to this method, we will add the lunar ages of the wife and husband together, then subtract 40.
If the result is a number greater than 40, we continue to subtract 40. Take this result and subtract 9, then subtract 8 and then subtract 9… until the result is a number less than or equal to 8, 9, then stop.
When the final result is an even number, if the wife is pregnant in this calendar year, the couple will give birth to a boy as desired. Conversely, if the wife is pregnant outside that year (or is pregnant this year and gives birth next year), she will give birth to a girl as desired.
When the final result is an odd number, if the wife gets pregnant during the year, the couple will have a girl. Conversely, if the wife gets pregnant outside that year (or gets pregnant this year and gives birth next year), the couple will have a boy as desired.

For example:
Suppose the husband’s age is 30, the wife’s age is 28.
Adding the ages of both husband and wife, we get 33 + 28 = 61; we do the subtraction as follows: 61 – 40 = 21, continue to subtract 9: 21 – 9 = 12, then subtract again for the last time: 12 – 9 = 3. So the result of the calculation is 3.
Because 3 is an odd number, if this couple gets pregnant and gives birth in the same year (gives birth to a boy as desired in 2018), they will have a girl. If they get pregnant at the end of the year and give birth the following year, they will have a boy.
2. How to calculate the birth of a boy or girl based on the mother’s age and the month of birth
Currently, in folklore and on the internet, there is a song that determines how to calculate the birth of a boy or girl based on the mother’s age as follows:
49 has been determined since ancient times
Add the birth month to play
Subtract the mother’s age
Add 19 to divide by half
Calculate the full moon age accurately
Even boys, odd girls exactly ten ten.
This song determines how to calculate the birth of a boy or girl based on the mother’s age to determine the baby’s gender. According to this method, if we call the month of birth of the child as the unknown “x” and the mother’s age as the unknown “y”, we will have the following formula: (49 + x – y + 19) : 2
Simplifying the formula, we get the following result: (68 + x – y) : 2. Just replace the month of birth of the child according to the lunar calendar in the position of “x”, then replace the mother’s lunar age in the position of “y” to calculate the result.
If the final result of this calculation is an even number, the couple will have a son. Conversely, if the result is an odd number, the couple will have a daughter.

For example:
Suppose the mother is 28 years old, and is due in the 6th lunar month.
Applying the above formula, we get: (68 + 6 – 28) : 2 = 23. Here, 23 is an odd number, so this couple will have a girl.
3. Boy and girl calculation table according to Chinese calendar
The Chinese calendar for calculating the birth of a boy or girl is said to have been used by ancient Chinese eunuchs. The basis of this calculation is the month of conception and the mother’s lunar age.
Please refer to the table below.
All 3 methods of giving birth as desired in 2018 will only be relative.
If you want to give birth as desired, especially to give birth to a boy or a girl as desired, the most accurate way to calculate the birth of a boy or a girl based on the mother’s age, we can combine all 3 methods to achieve the most reasonable results.
See more: Is Protandim good? The amazing uses of the product.
4. Combine the method of calculating whether to have a boy or a girl based on the mother’s age to be able to have the child you want.
First, we can use the first method to determine the desired year of birth to be able to choose the appropriate time of conception. Next, we apply the second method to decide the month of birth.
Suppose the couple needs an even number to give birth to a boy as desired in 2018, and the mother is odd-aged, then the couple should choose an odd-aged month.
When both husband and wife have correctly determined the month of birth (odd or even month), we should use the third method – the last method to most accurately determine the appropriate month of conception.
The above method can also be applied to the method of calculating ovulation to give birth to a boy
Example of calculating to give birth to a boy
The husband is 33, the wife is 25 years old and wants to give birth to a boy. When applying the first method: The total age of the couple is: 33 + 25 = 58, continue subtracting and we have 58 – 40 = 18; then subtract 9: 18 – 9 = 9, the final subtraction is: 9 – 8 = 1.
The final result is 1, which is an odd number. Thus, if next year, the couple adds their lunar age (each person adds 1 year, the total is 2 years), the remainder will be 3, which is also an odd number.
Therefore, if they get pregnant and give birth in the same year, they will give birth to a girl as they wish, if they conceive and give birth outside the year, they will give birth to a boy as they wish.
So if this couple wants to give birth to a boy as they wish, they must get pregnant this year and give birth next year.
- Applying the second method, we have: (68 + x – y) : 2. The mother’s lunar age here is 25. So the unknown y = 25. Substitute into the above formula, we have: (68 + n – 25) : 2 = (43 + n) : 2.
To satisfy the final result as an even number to achieve the purpose of calculating the birth of a boy or a girl based on the mother’s age, we must choose an odd birth month. For example, giving birth in January: (43 + 1 ): 2 = 22. - Applying the third method:
After clearly determining, this couple must give birth in an odd month and need to get pregnant and conceive this year (when the mother’s lunar age is 25), and at the same time give birth next year (when the lunar age is 26 years old).
We look up the table above to find an odd month in the year 26 (for example, month 1 – 3 – 7), then calculate back 9 months to fall on a month of pregnancy, the most suitable pregnancy has a (+) sign.