Minecraft Ring Generator
Set an outer and inner diameter (1 to 256 blocks) to generate a hollow Minecraft ring, with the full block grid, a row-by-row width table, and the total block count.
1 to 256.
0 to 20. 0 gives a solid disk.
Total blocks
212
Blocks per quadrant
53
approximate, by symmetry
| Row | Width (blocks) |
|---|---|
| 0 | 7 |
| 1 | 11 |
| 2 | 13 |
| 3 | 15 |
| 4 | 12 |
| 5 | 10 |
| 6 | 8 |
| 7 | 10 |
| 8 | 8 |
| 9 | 8 |
| 10 | 8 |
| 11 | 8 |
| 12 | 8 |
| 13 | 10 |
| 14 | 8 |
| 15 | 10 |
| 16 | 12 |
| 17 | 15 |
| 18 | 13 |
| 19 | 11 |
| 20 | 7 |
How it's calculated
A ring is a filled outer circle with a filled, centered inner circle subtracted from it -- both built with the same digital-disk test the Circle Generator uses. The result is every block that's inside the outer diameter but outside the inner one.
Worked example: outer 21, inner 13
A ring with a 21-block outer diameter and a 13-block inner diameter uses 212 blocks -- against 349 blocks for a fully filled disk of the same outer size, so this ring saves 137 blocks by leaving the middle open. Enter 21 and 13 into the generator above to reproduce this exact grid.
Frequently Asked Questions
How is a ring different from a circle outline?
A circle outline is a thin, fixed-thickness wall traced right at the edge of the shape. A ring is the full filled area between two independently sized circles -- an annulus -- so it can be as wide as you want, all the way from a thin line up to nearly the whole disk. Use the Ring Generator when the gap has to be a specific size (a moat, a walkway around a tower base) rather than just "the wall."
What happens if I set the inner diameter to 0?
An inner diameter of 0 removes nothing, so the result is a fully filled disk -- identical to running the outer diameter through the Circle Generator in filled mode.
Does the inner circle have to be centered?
Yes, this tool always centers the inner cutout inside the outer circle, which is the standard even ring shape. For an off-center cutout you'd need to place blocks by hand after generating the outer disk.
What's a good outer/inner ratio for a walkable ring, like a moat walkway or an arena rim?
Leave at least 3-4 blocks of width (outer diameter minus inner diameter, divided by 2) so a player can comfortably stand and walk the ring without clipping the inner or outer edge -- the row-width table above the grid shows the exact width at every row so you can check before building.
Circle In Blocks is a set of fan-made building tools, not affiliated with Mojang or Microsoft; Minecraft is a trademark of Mojang Studios. Grids are generated from the geometry described above, not pulled from the game itself -- see the Terms.