Replacement Star Calculator (Flying Star)
This free online Replacement Star Calculator contains all possible charts for Out of Trigram/Void Lines or Death & Emptiness (DE) Houses
Beneath each menu drop-down option, you’ll encounter two different flying star substitute charts: one illustrating the chart before the exact void line, and another displaying the chart after the void line. Utilize your own discretion to determine the precise facing degree of the home and decide which chart is applicable.
How to Use the Replacement Stars Calculator
⇓ = The arrow indicated the facing direction of the house ⊥= This symbol indicated the sitting direction of the house
You may have noticed that in the selection drop-down menu for “House Period,” the end of the previous year is shown. For example, Period 8 does not officially end on December 31, 2023, but rather on February 4, 2024.
This pattern is consistent across all other Periods. If the roof and ceiling of a house were installed very close to the transition date into the next Period, there is a good reason to believe we could already use the new Period charting, as these major energies tend to shift prior to the official transition date.
Once you have calculated the replacement chart for the given house facing degree, you can proceed by applying all the necessary remedies or enhancers according to the flying star energies indicated on the replacement chart.
Many Feng Shui Masters advocate for a more generous cutoff range, sometimes extending up to 2 degrees in each direction from the actual void line degree. Personally, I am not convinced that such a large range is necessary, as it would classify a significant portion of the 360 compass degrees as Out-of-Trigram homes. Therefore, a more conservative and realistic approach is to use a range of one (1) degree on either side.
Display of Magic Square Instead of Luoshu
For teaching purposes, we have used the magic square format to highlight the different energies in each section. However, the pie chart method would more accurately depict how the electromagnetic forces of the eight trigrams and nine stars move in each direction.
Please note that the center is not literally a center; it is merely a small dot or reference point for Qi, serving to distribute its energy into various directions.
Why to apply Replacement Chart over regular Period Chart?
Since electromagnetic energy cannot stabilize in these Out of Trigram or Borderline Void houses, the environment becomes intense and highly unstable. To better understand what is happening, let’s delve into the realm of physics.
Physics explains that the interaction between two different electromagnetic fields occurs due to their differing directions at the boundary. Each electromagnetic field has its own unique magnitude and direction. When charged particles interact at a specific point, they oscillate between both electric fields, temporarily combining these fields until they separate and revert to their original states.
Typically, when an electromagnetic field is stable, the electrons exhibit a behavior called “bunching,” where they cluster together and interact as a group. However, in the presence of instability, thin threads of filaments form, a phenomenon known as “filamentation.” This disrupts the bunching, causing the electrons to continually move between the two different electromagnetic fields.
The borderline home is literally trapped in the middle, unable to escape these cosmic forces. Because these forces are unpredictable, these specific compass degrees are often referred to as Void Lines or Death & Emptiness (DE).
History of the Replacement Star Charting System
According to Stephen Skinner, Chiang Ta Hung (Jiang Da Hong) introduced the concept of replacement stars shortly before 1714. Legend has it that, towards the end of his life, Chiang contemplated retiring to the rural countryside.
Meanwhile, one of his students continually sought guidance on managing unstable qi at the border lines between gua (trigrams). Chiang proposed sharing the formula with the student in exchange for a sufficient sum of gold coins to procure himself a tranquil country retreat for his retirement.
It’s probable that Chiang’s student, Jiang Da Hong, who was among the pioneers of the San Yuan school, extensively explored the given formula, refining it into a suitable charting system. He likely introduced and labeled it as the “Replacement Stars of Borderline Gua.”
However, the precise route through which this method entered the public domain remains somewhat obscure. Even today, many Feng Shui Grand Masters maintain strict secrecy within their lineages, reserving certain methods exclusively for internal teaching and not sharing them with outsiders.
Major Borderline Degrees of Home Facing
In the table below, you will find the primary cardinal directional boundary degrees and the corresponding cut-off ranges between two major directions.
| Exact Borderline Degree | Cut-Off Range (+/-1 degree) | Cardinal Directions (MAJOR) |
|---|---|---|
| 22.5° | 21.5°-23.5° degrees | North & Northeast (Kan & Ken) |
| 67.5° | 66.5°-68.5° degrees | Northeast & East (Ken & Zhen) |
| 112.5° | 111.5°-113.5° degrees | East & Southeast (Zhen & Xun) |
| 157.5° | 156.5°-158.5° degrees | Southeast & South (Xun & Li) |
| 202.5° | 201.5°-203.5° degrees | South & Southwest (Li & Kun) |
| 247.5° | 246.5°-248.5° degrees | Southwest & West (Kun & Dui) |
| 292.5° | 291.5°-293.5° degrees | West & Northwest (Dui & Qian) |
| 337.5° | 336.5°-338.5° degrees | Northwest & North (Qian & Kan) |
Minor Borderline Degrees of Home Facing
In the table provided below, you’ll locate the precise degree thresholds and cutoff degrees for the minor cardinal directional boundaries, specifically marking the transition between the first and second sectors within every major direction.
| Exact Borderline Degree | Cut-Off Range (+/-1 degree) | Cardinal Directions (Minor) |
|---|---|---|
| 37.5° | 36.5°-38.5°degrees | NE1 and NE2 |
| 82.5° | 81.5°-83.5° degrees | E1 and E2 |
| 127.5° | 126.5°-128.5° degrees | SE1 and SE2 |
| 172.5° | 171.5°-173.5° degrees | S1 and S2 |
| 217.5° | 216.5°-218.5° degrees | SW1 and SW2 |
| 262.5° | 261.5°-263.5° degrees | W1 and W2 |
| 307.5° | 306.5°-308.5° degrees | NW1 and NW2 |
| 352.5° | 351.5°-353.5° degrees | N1 and N2 |

1000 mercis ! Thank you so much to share this method. I am learning Feng Shui and was despairing by the answers I got regarding void lines. Bless you !
Thank you so much for your kind words! I’m really glad to hear that the method I shared helped bring some clarity. I highly recommend using the void line calculator, it really streamlines the process and saves valuable time during audits. If you have any questions along the way, please don’t hesitate to reach out to us. Wishing you all the best on your Feng Shui journey, may your studies lead you to help others create more harmonious, prosperous lives.