Build this circle

Circle tower planner

0Blocks
0As stacks
11 × 11Footprint
8 highWall
Row 1

Pick a row to build. Arrow keys move, Enter marks it done.
RowBlocksFrom the west edge

How to use it in-game

Stand at the north-west corner. Row 1 is the north face of the preview. Finish the highlighted row, mark it done, then walk one block south. Repeat that footprint for each wall layer. Progress stays in this browser. Full blocks only — stairs and slabs are not in this first version.

Why isn't this a perfect Euclidean circle?

Minecraft blocks sit on a square grid. The generator marks a cell if the centre of that block falls inside the chosen radius, then strips every block that is completely surrounded, which leaves a wall exactly one block thick. That is the usual survival approximation for towers, dome bases and farm rings.

What is a good starter diameter?

11 and 15 are easy to centre on a single block. Even diameters (12, 16, 20) centre on a 2×2 and are better for portals or iron farm rings.

Does this use the Minecraft trademark?

The word describes the game the blueprint is for. Sealmount is an independent fan tool and is not approved by Mojang.