◆ Feng Shui Signal

Free tool · Works with both schools

Bagua Map Overlay

By The Feng Shui Signal Editorial Team · Updated

In short Upload a floor plan (or start with a blank grid), lay the nine-square bagua over it, and export the result as a PNG. The tool supports both placement schools — classical compass sectors or BTB front-door alignment — and everything runs in your browser: the image never leaves your device.

Drag inside the grid to move it; drag a corner to resize. Your image stays on your device.

How the two modes place the grid

Compass (classical): the nine squares stay aligned to your floor plan, and each outer cell is labeled with the compass sector its position points toward from the center, using the Later Heaven bagua (career north, wealth southeast, and so on). You supply one fact: the compass bearing the top of your plan faces. Note that some classical practitioners divide the home into eight 45° pie slices from the center rather than nine equal squares; the two methods agree near the cell centers and can differ near corners. This tool uses the nine-square (Lo Shu) division.

BTB (front door): the American Black Sect convention — no compass at all. The wall containing your main entrance is always the Knowledge–Career–Helpful People row, so wealth sits in the far-left cell as you stand in the doorway looking in. Tell the tool which edge of your plan holds the door and it rotates the grid accordingly.

Which to trust is a school choice, not a fact question — our bagua reference page explains the split. Whichever you pick, use it consistently, and interpret the cells with the five-element cycles.

Frequently asked questions

Should I use the compass mode or the BTB mode?

Use the mode matching the school you follow, and stay consistent. Compass mode is the classical method: sectors follow real compass directions, so you need to know which way your floor plan faces. BTB mode is the simplified American method: the grid always aligns to the wall containing your main door.

How do I find which direction the top of my floor plan faces?

Stand in your home holding the floor plan oriented to match the rooms around you, then read a phone compass while facing 'up' relative to the plan. That bearing is what you enter. Take the reading away from large metal objects and note that phone compasses are approximate.

Where do I measure from, the center or the door?

In the classical compass method, sectors radiate from the center of the home, so center the grid on the floor plan's occupied area. In BTB, no measurement is needed: the door wall fixes the grid.

What if my home is L-shaped or irregular?

Size the grid to the smallest rectangle that contains the full floor plan. Cells that fall outside the walls are the 'missing areas' of traditional analysis. Our bagua map article explains how tradition treats them.

Is my floor plan uploaded to a server?

No. The image is read and drawn entirely inside your browser with the HTML canvas API. Nothing is transmitted, stored, or logged, and the exported PNG is generated locally on your device.

Sources & further reading

  1. I Ching (Book of Changes) — source of the trigram system behind the grid.
  2. Ole Bruun, An Introduction to Feng Shui (Cambridge University Press, 2008) — on the Later Heaven arrangement and the BTB school's front-door alignment.