Minecraft Sphere Generator
Layer-by-layer sphere and ellipsoid blueprints with block counts, ghosted alignment from the layer below, and per-layer PNG export.
Building a sphere without losing your place
The hard part of a sphere is not the maths, it is keeping track of which ring goes where. Use the layer slider or the arrow keys to step upward, and build one layer per step. The pale squares show the layer you have just finished, so every new ring has something to line up against — which is where most freehand spheres go wrong.
Start from the middle layer if you are building in survival: it is the widest ring and the easiest to place accurately, and everything above and below hangs off it. Scaffolding under the equator saves a lot of falling.
FAQ
How do I build a sphere in Minecraft?
A block sphere is built one horizontal layer at a time. Set the diameter above, then work up from layer 1: each layer is a circle, and the tool shows the layer below in pale blue so you can line the next ring up correctly.
What is the smallest sphere that still looks round?
Below about 9 blocks a sphere reads as a cube with the corners knocked off. From 15 upward it looks convincingly round, and 25 and above is smooth enough for domes and planetariums.
Hollow or solid?
Hollow gives you just the shell, which is what you want for a build you will stand inside. Solid fills the whole volume, useful for terraforming or for carving out later. The block count changes dramatically between the two.
Can I make an egg or an ellipsoid?
Yes. Switch off Perfect sphere and set width, height and depth separately. Taller than wide gives an egg; wider than tall gives a squashed dome shape.