Minecraft Arch Generator
Choose a round, pointed (gothic) or shallow arch, set the span, rise, leg height, thickness and depth, and the tool draws the front view on a numbered grid with the blocks in each row and the total. A 3D preview shows the arch from any side.
How to build an arch in Minecraft
- 1
Pick the arch type
Round for a classic doorway, pointed for a gothic window or hall, and segmental for a wide, shallow bridge or gate.
- 2
Set span and rise
The width is the span between the outer edges. The rise is the height of the curve above the straight legs, and the leg height adds straight sides below it.
- 3
Set thickness and depth
Thickness is how wide the arch ring is, and depth is how far it goes back. A depth of 1 gives a flat arch you can repeat.
- 4
Build from the front view
Follow the row counts on the front-view grid, from the top down, then repeat it for the depth. Check with the 3D preview.
Example Minecraft arches
A few common arches and the blocks they need for each 1 block of depth, worked out by the same code as the tool.
| Small round doorway | 7 wide and 4 high, 9 blocks for each 1 block of depth. |
|---|---|
| Round arch with legs | 9 wide and 7 high, 17 blocks for each 1 block of depth. |
| Wide round arch | 11 wide and 9 high, 23 blocks for each 1 block of depth. |
| Thick stone arch | 15 wide and 11 high, 56 blocks for each 1 block of depth. |
| Pointed gothic arch | 9 wide and 9 high, 21 blocks for each 1 block of depth. |
| Tall pointed arch | 13 wide and 13 high, 29 blocks for each 1 block of depth. |
| Shallow bridge arch | 13 wide and 6 high, 19 blocks for each 1 block of depth. |
| Wide shallow arch | 21 wide and 9 high, 33 blocks for each 1 block of depth. |
Round, pointed and segmental arches
A round arch is a half circle or half oval on top of two straight legs. It is the shape of most doorways and old bridges, and it is easy to read in blocks. A pointed arch, also called a gothic arch, has two curves that meet at a point, so it is taller than half its width. It looks lighter and suits windows, halls and gates. A segmental arch is a shallow part of a circle that rises less than half its width, which suits wide bridges and low gateways.
The tool draws each type as an outline of the thickness you choose. The curve is symmetric about the middle line, so you can build the left half and mirror it. If a pointed arch is given too little rise, or a segmental arch too much, the tool adjusts the rise and says so under the inputs.
Span, rise, thickness and depth
The span is the width between the outer edges. The rise is how much the curve climbs above the top of the legs. Add leg height for straight sides before the curve starts, which gives the arch headroom. A thickness of 1 is a thin ring, and 2 or 3 gives a heavy stone arch. The depth is the length of the tunnel behind the arch, so a depth of 8 makes a short passage with an arch at each end.
The summary shows the total blocks and the blocks per front row. Use it to work out how much stone to bring. The front-view grid lists row 1 at the top, so you can start at the keystone and work down each side. The 3D preview shows the depth, which is useful for bridges and tunnels.
Placing an arch accurately
Build the legs first to the right height, then mark the top centre block of the curve. From the top row, work down each side with the row counts. The symmetry hint says how many blocks one side has, so you can build one half and copy the other. If you plan a row of arches, build one and copy it by the span, or use the same numbers to make a matching set.
For a bridge, use a segmental arch with a large depth, then place a flat deck on top. For a gate, use a round arch with thick walls. For a hall, repeat pointed arches along the length. There is no WorldEdit command for arches, so the tool leaves it out and the grid is the reference.
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