Design tool
Minecraft Dome Generator
Build a dome or hemisphere roof — the top half of a sphere, widest circle on the ground. A hollow dome is open underneath so you can walk inside. Step through it layer by layer or rotate it in 3D.
Shape
The shape to generate. Each one has its own page with worked examples.
Diameter16 blocks
Drag the slider, or type an exact block count.
Layer 1 of 8316 blocks
Slide to step through the build from bottom to top.
How to use the Dome Generator
Build a dome or hemisphere roof — the top half of a sphere, widest circle on the ground — with the block count and a 3D preview.
Quick steps
- 1Set the diameter
- 2Choose Filled, or Outline or Thick outline (a hollow shell, open underneath)
- 3Build each circle at its height, widest first
- 4Rotate the 3D view to check it
Example use cases
- Roofs over rooms and arenas
- Observatories and planetariums
- Turret caps and rotundas
Tips
A hollow dome is open at the base so you can build inside it
Sit a dome on a cylinder for a round tower with a roof
The 3D view skips the hidden inside of a solid dome, so it stays fast at large sizes
Frequently asked questions
How do you build a dome in Minecraft?
A dome is the top half of a sphere: the widest circle sits on the ground and the layers shrink as they rise to a point. Build each circle at its height. This generator shows every layer, the block count, and a 3D preview of the finished dome.
Is a dome hollow underneath?
A hollow dome is just the curved shell and is open at the bottom, so you can walk inside — perfect for a roof over a room or an arena. A filled dome is a solid hemisphere. Choose whichever you need.
What is the difference between a dome and a sphere?
A dome is exactly the top half of a sphere. If you want a full ball, use the sphere generator; for a roof or hemisphere, the dome is the half you need, already sitting flat on the ground.
How many blocks does a dome need?
Roughly half of the equivalent sphere. A hollow dome uses far fewer than a filled one since it is only the shell. The generator shows the exact total and the count for the layer you are viewing.