Layer Y=0: radius 3
Build this as a 7 x 7 Minecraft circle.
Minecraft Circle Generator
Minecraft 3D circle generator with Y-layer charts
A simple 3D circle can be planned as stacked 2D circles. Each Y layer gets its own radius, then you build each grid from bottom to top.
Layer radius plan
Layer Y=0: radius 3
Layer Y=1: radius 5
Layer Y=2: radius 6
Layer Y=3: radius 5
Layer Y=4: radius 3
Layer Y=1: radius 5
Build this as a 11 x 11 Minecraft circle.
Layer Y=2: radius 6
Build this as a 13 x 13 Minecraft circle.
Layer Y=3: radius 5
Build this as a 11 x 11 Minecraft circle.
Layer Y=4: radius 3
Build this as a 7 x 7 Minecraft circle.