Build Planning
Pick a shape, enter dimensions in blocks, get the total plus a stack and shulker-box breakdown.
Outer footprint ring × height, minus any openings below. Corners are counted once.
Subtracting 0 blocks for openings
Length × width × layers. Use 2 layers for a floor you also want a ceiling below.
Length × width × height — every block filled solid.
Outer volume minus the hollow interior. Walls, floor, and ceiling all included at the given thickness.