Plan voxel builds before you place the first block.
Generate circles, spheres, ovals and cylinders, calculate portal coordinates, and convert block counts into stacks. Fast, visual, mobile-friendly, and no sign-up.
Build tools
Each tool solves one concrete building problem and works fully client-side.
Minecraft Circle Generator
Hollow or filled circles with block count, row-by-row guide, progress tracking and PNG export.
Most popular tool →Sphere Generator
Step through a sphere one horizontal layer at a time and see total block requirements.
Open layers →Oval Generator
Choose independent width and height for stadiums, arches, plazas and custom footprints.
Generate oval →Cylinder Generator
Plan tower footprints and calculate the total blocks for any cylinder height.
Plan tower →Nether Portal Calculator
Convert X/Z coordinates between the Overworld and Nether using the 8:1 horizontal scale.
Convert coordinates →Block & Stack Calculator
Turn block totals into stacks, remainders, shulker boxes and double chests.
Count materials →Designed for actual building, not just screenshots
Why use a block-shape generator?
Large circles and spheres are easy to distort when built by eye. A grid turns a mathematical shape into discrete rows or layers you can copy directly into a block world. Start with the diameter or dimensions you want, then follow the generated pattern instead of estimating the curve.
The tools are useful for towers, domes, arenas, roads, plazas, portals and material planning. They do not place blocks in-game; they give you a deterministic blueprint and count that you can verify before building.
Minecraft building guides
Short practical guides for turning the generated plans into real builds and avoiding common counting mistakes.
How to build circles
Diameter, wall thickness, symmetry checks and a reliable row-by-row workflow.
Read guide →How to build spheres
Layer pairing, center markers and hollow-shell planning for cleaner spheres and domes.
Read guide →How to build ovals
Choose width and height, keep both axes aligned and use ovals for long footprints.
Read guide →Round towers & cylinders
Plan a circular footprint, wall thickness, height and realistic material allowances.
Read guide →Nether portal coordinates
Understand the 8:1 X/Z conversion and why calculated coordinates do not always guarantee pairing.
Read guide →Stacks & storage capacity
Convert item counts into stacks, shulker boxes and double chests for material runs.
Read guide →