Minecraft Circle Generator
A diameter-15 Minecraft circle uses 149 blocks arranged in a near-perfect pixel grid. This circle generator creates a block-by-block layout for any circle diameter up to 256, using the distance-from-center midpoint method so every block falls inside the circle boundary.
Quick answer
Pick a diameter from 1 to 256 blocks.
What this tells you
- •Pick a diameter from 1 to 256 blocks.
- •The generator places every block whose center lies inside the circle radius.
- •Use the grid as a blueprint to place blocks layer by layer in your Minecraft build.
How to Use
- 1Enter the circle diameter you want in blocks.
- 2Click Generate to produce the block grid.
- 3Read the grid row by row: each filled cell is a block to place.
- 4Repeat for each layer to build domes, towers, or rounded walls.
How It Works
Formula
Block = 1 if distance(center, block-midpoint) <= radius, else 0The generator places a circle of a given diameter on a square grid. Each cell is a block whose midpoint distance from the center is checked against the circle radius. Cells inside the radius become blocks. This is the standard pixel-circle method used by Minecraft builders and pixel artists.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Diameter 15 circle
A diameter-15 circle fits inside a 15x15 grid and uses 149 blocks. The layout is nearly circular with the center row containing 15 blocks and the edges tapering to a single block at the top and bottom.
Diameter 31 dome base
A 31-block-diameter circle is a common size for a dome base. The 31x31 grid shows where every block goes in the bottom layer. Stack shrinking diameters on top to build a full dome.
Minecraft Circle Block Counts by Diameter
Common circle diameters and the number of blocks each one uses.
| Diameter | Block Count | Grid Size | Good For |
|---|---|---|---|
| 5 | 21 | 5x5 | Small pillar |
| 9 | 69 | 9x9 | Small tower |
| 15 | 149 | 15x15 | Medium tower or floor |
| 21 | 333 | 21x21 | Large tower base |
| 31 | ~733 | 31x31 | Dome or mega build |
Common mistakes
- Using an even diameter. Minecraft circles work better with odd diameters so the center lands on a single block rather than between four blocks.
- Counting blocks outside the radius. The generator includes only blocks whose midpoint is inside the circle, which gives the cleanest visual result.
- Forgetting to stack layers when building a sphere or dome. Each layer needs its own diameter, shrinking as you go up.