Circle generator for Minecraft: circles, ellipses, spheres and domes
Plan round builds block by block: circles, ellipses, spheres and domes of any size, layer by layer, with block counts and a schematic to download.
Round shapes are the hardest thing to build by eye in a world made of cubes. This generator draws the plan for you: pick a shape and a size, and every filled square is one block. Spheres and domes come layer by layer, so you build them from the bottom up, one slice at a time.
How to use it
- Pick the shape: a circle, an ellipse (a stretched circle, with its own width and depth), a sphere or a dome (the top half of a sphere).
- Enter the size in blocks. A circle of diameter 21 is 21 blocks from one side to the other.
- Choose Outline for walls and rings, or Filled for floors and solid shapes. For an outline, set how many blocks thick the wall is.
- For a sphere or a dome, step through the layers with the slider or the minus and plus buttons. The layer below shows in a lighter color, so you can see where the next layer steps in or out.
- Save the plan as a picture to keep beside the game, or download a schematic to paste the whole shape with WorldEdit or Litematica.
Tips for building round shapes
- Mark the middle first. The dashed lines cross at the center; build one quarter and the other three are its mirror images.
- Count along the darker lines: they come every five blocks, and pointing at a square tells you its position and how many blocks its row has.
- Odd sizes have a single middle block, which makes the center easy to find. Even sizes have a middle line between two blocks instead.
- For a dome, start with the widest layer on the ground and work up. Scaffolding or a pillar in the middle helps you reach the top.
- Use a contrasting block for the plan of the first layer, then replace it once the shape is right.
Thick or thin outlines
A thick outline joins every block to the next along a side, so the wall has no gaps you can see through, and mobs cannot slip through diagonally. A thin outline lets blocks touch only at their corners where the curve steps: it uses fewer blocks and looks lighter, which suits decorations and floor patterns more than walls.
Questions
How many blocks does a sphere take?
The counter above the plan adds up every block of the shape you chose. A hollow sphere 21 blocks across with a one-block wall takes well over a thousand blocks; a filled one takes nearly three times as many. Each layer's count is shown too, so you can gather blocks a layer at a time.
What is in the schematic file?
The whole shape in the block you name, as a Sponge schematic (.schem). WorldEdit and FastAsyncWorldEdit load it with //schem load, and Litematica can open it too. Air is left empty, so pasting it does not clear what is inside.
Does it work for Bedrock Edition?
The plans do: a circle is the same in every edition. Schematics are for Java Edition tools; on Bedrock, build from the plan, or use a structure tool that reads .schem files.
Everything happens in this page: nothing is uploaded, and your last settings are remembered in this browser. For other round projects, see the pixel art generator for pictures made of blocks, and all tools.