Layer-by-layer 3D ball calculator

Minecraft Sphere Generator & Ball Calculator

Turn a 3D sphere into buildable horizontal block layers. Select the diameter, calculate materials, and follow layer-by-layer charts around a single center coordinate.

Every layer is buildable.
The lower and upper hemispheres mirror each other, while the widest layers meet around the sphere’s equator.

21 × 21 Sphere · Layer 11/21
100%
56blocks this layer
21width
21height
11current layer

How to make a sphere in Minecraft (Layer-by-Layer Guide)

A Minecraft block sphere or ball is built as a stacked series of circular cross-sections. Begin with Layer 1 at the lowest point, erect a vertical reference pillar through the center coordinate, and place each subsequent layer directly above the previous chart. The upper hemisphere repeats the lower pattern in reverse order.

Hollow sphere vs. filled ball

Outline mode displays the outer voxel shell required on the current horizontal layer (ideal for planetary builds, giant pokeballs, death stars, and hot air balloons). Filled mode displays every block inside that cross-section, which is essential for solid sculptures, asteroids, and terraforming.

Choosing an odd vs. even sphere diameter

Odd diameters (e.g. 15, 21, 25) have one central pole block and one single widest equator layer. Even diameters (e.g. 16, 20, 30) center between four blocks and feature two identical widest layers around the midpoint.

Keep every chart centered. A single-block horizontal shift on any layer creates an asymmetrical bulge. Anchor the central vertical line before laying Layer 1.

Sphere versus dome roofs

A sphere includes both lower and upper curved halves. If you only need a rounded roof, greenhouse cover, or arena ceiling starting at ground level, use the specialized Minecraft dome generator. For flat horizontal foundations, visit the Minecraft circle generator.