Shape and size
Circle, ellipse or sphere slice, in three ring styles
Block layout
17 × 17 — 20 blocks
How to use it
Reading the grid, and stacking it into a tower or dome
Each filled cell is one block. Build the layer in any block, then stack identical layers for a tower. For a sphere, build progressively smaller circles centred on the same column — the diameter shrinks as you move away from the equator.
Thin rings read as the most round from the inside; thick rings are easier to walk on top of.
Common circle radii
Diameter, perimeter and what each size is good for
| Radius | Diameter | Perimeter blocks | Suggested build |
|---|---|---|---|
| r = 5 | 11 × 11 | 32 | Small fountain or campfire surround |
| r = 7 | 15 × 15 | 44 | Medium tower base, single-room silo |
| r = 10 | 21 × 21 | 64 | Standard wizard tower, lighthouse |
| r = 15 | 31 × 31 | 96 | Large keep, central rotunda |
| r = 20 | 41 × 41 | 128 | Coliseum, big dome roofs |
| r = 30 | 61 × 61 | 192 | Mega-base wall, full arena |
More Minecraft tools
The rest of the set, for the parts of the build this one doesn't touch
Frequently asked questions
Radii, ring styles and building spheres
How big should a Minecraft circle be? +
For round towers, a radius of 7–10 blocks (15–21 across) reads cleanly from inside and outside without looking like an octagon. Below radius 5, blocky aliasing dominates; above radius 30, you start hitting chunk boundaries and need to plan walkways at the cardinal points.
How do I make a perfect circle in Minecraft? +
There is no truly perfect circle when every pixel is a 1×1×1 block — the best approximation is the midpoint circle algorithm, which picks the closest block for each octant. This generator uses that algorithm and outputs the exact same layout you'd get from /fill with the right replace mode, just easier to plan.
What's the largest pixel circle I can build? +
The generator caps at radius 32 (65×65 footprint) which is plenty for in-game megabuilds. Past that, plot the perimeter in 8-block octants and tile them — the math stays the same, you just paste the pattern around the center.
Last verified for Minecraft 26.2