Minecraft Dome Generator

It takes the top half of a sphere and breaks it into horizontal layers — each layer is just a circle, and the circles get smaller as you go up. You start with the widest circle at the bottom (the base ring) and stack smaller circles on top until you reach the tip. This dome generator shows every layer with red number labels so you always know how many blocks go in each row.

It depends on the radius and whether you go hollow or filled. As a rough guide: a hollow radius-10 dome takes about 628 blocks (around 10 stacks), and radius-15 needs about 1,414 blocks (22 stacks). The generator shows the exact count for any size — including the extra blocks for the base and skirt if you use them.

It really depends on what you're building. Radius 5–8 works well for small rooftops and chapel ceilings. Radius 10–16 is the sweet spot for cathedral domes, greenhouses, and arena covers. Go 20–30 for grand palaces and stadiums. Anything above 32 is mega-dome territory — impressive, but you'll need a lot of blocks. Quick tip: the dome spans (2 × radius + 1) blocks wide.

A dome is just the top half — imagine slicing a sphere at the equator and keeping the upper portion. That's why domes sit naturally on top of buildings as rooftops, cathedral ceilings, or greenhouse covers. A full sphere floats as a complete ball shape, which is better for things like Death Stars or planet builds. If you need the full ball, check out the sphere generator.

Yes — there are two modes. 'Open' gives you just the curved shell with no floor, so you can place it on top of walls you've already built. 'Closed' fills in the bottom circle to seal the dome completely. Closed base is what you want for underwater domes or any structure that needs to be airtight. You can also add a skirt (straight walls below the curve) to get more headroom inside.

A skirt is a ring of straight vertical walls that go below the dome before the curve starts. Without a skirt, the dome curves inward right from the ground level, which doesn't leave much room inside. Adding a 3–5 block skirt gives you actual walking space before the ceiling starts sloping. Think of it like the walls of a building with a domed roof on top.

Set hollow mode with thickness 1, pick your radius, and follow the layer guide — just use glass blocks instead of stone. Green-stained glass looks great for greenhouses. For observatories, you can use solid blocks for the skirt section and switch to clear glass where the curve starts. The blueprint grid shows each layer clearly, so it's easy to keep track of where every glass block goes.

Definitely — it's one of the coolest builds you can do. Use 'Closed' base so the floor seals everything off, pick a radius between 12 and 20, and build up from the ocean floor using glass blocks. Once the shell is done, drop sponges inside to drain the water layer by layer. The blueprint makes sure every block is in the right spot, so you won't get any leaks.