Minecraft Dome Generator (Java & Bedrock)
Set the width and height, then build from the base layer up. A 25-wide, 13-tall hollow dome uses 1,365 blocks and has an open floor.
Runs on your device · nothing uploaded
This tool is code that runs inside your browser. Your files, text and pictures are read here and never sent to a server, so it even works offline once loaded. Signed in? Only what you save to your account (My Kit, wardrobe) or publish is uploaded.
Blocks for common dome sizes (hollow, solid wall)
| Width | Height | Blocks | Stacks + blocks |
|---|---|---|---|
| 11 | 6 | 237 | 3 + 45 |
| 15 | 8 | 473 | 7 + 25 |
| 21 | 11 | 953 | 14 + 57 |
| 25 | 13 | 1,365 | 21 + 21 |
| 31 | 16 | 2,125 | 33 + 13 |
| 41 | 21 | 3,773 | 58 + 61 |
| 51 | 26 | 5,901 | 92 + 13 |
Counts come from the same generator as the tool above, so they always match the grid.
How to use it
- Set the width of the base and how tall the dome should be. Half the width gives a round, sphere-like dome.
- Layer 1 is the base ring that sits on the ground. Build it first.
- Move up one block and press › to see the next ring. Repeat until the roof closes.
- Lower the height for a flatter dome, or raise it for a tall, egg-shaped roof.
- Use Wall thickness 2 or more for a dome you can carve windows into.
How it works
Each block is placed if its centre falls inside the perfect shape that fits your size exactly. Hollow shapes keep only the blocks within your chosen wall thickness of the outside, so walls never have gaps. Every number on this page is calculated, not typed by hand.
Questions
Does the dome include a floor?
No. A hollow dome is open at the bottom so you can put it on top of walls or a base. Choose Filled if you want a solid mound instead.
What height makes a perfect half sphere?
Use a height of about half the width, rounded up. For example, width 25 and height 13.
Does this work for Minecraft Bedrock and Java?
Yes. Blocks are the same size in Java and Bedrock, so the same layout works in both editions and in every version.
Why is the centre a 2×2 square on even sizes?
An even diameter has no single middle block, so the centre falls between four blocks. Use an odd size (like 25) if you want one middle block to build from.
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By PickaxeKit Editorial Team. Updated 2026-11-09.