Minecraft 21x21 Dome — 521 Blocks
Get the exact block pattern for a Minecraft 21x21 Dome. 521 blocks needed — works in both Java and Bedrock editions.
56 blocks
Layer 1
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Layer 2
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Layer 3
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Layer 4
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Layer 5
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Layer 6
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Layer 7
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Layer 8
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Layer 9
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Layer 10
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Layer 11
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521 blocks
A 21-block Minecraft Dome uses 521 blocks.
Key facts
| Diameter | 21 |
| Blocks | 521 |
| Layers | 11 |
| Height | 11 |
Materials needed
To build this Dome you will need:
| 521 blocks | 521 |
| 9 stacks of 64 | 9 |
| about 3 minutes | 3 |
Layers shrink as you go up, so the ground ring uses the most blocks. A center pillar keeps every layer aligned.
How to build it
- Start with the full base circle on the ground, just like a flat circle.
- Stack each next layer with a smaller ring, keeping the same center.
- Follow the blueprint layer grid for the exact ring size of every layer.
- Use slabs or stairs to smooth the curve as it gets steeper.
- Close the top with the smallest ring and fill the center block.
Copy it as /setblock commands
Open the generator and hit Copy /setblock to get every block as a Minecraft command. Add your world coordinates and the whole Dome lines up exactly where you want it to be.
/setblock 0 64 0 minecraft:stone
Builder
Build it block by block: turn on Builder mode in the generator to mark each placement with a click, step with Next and Prev, or press Play to auto-advance.
What to build with it
A 21-block Dome works well for: Small tower
Related sizes
Other shapes
Common sizes and what to use them for
- 15Fountain base
- 21Small tower
- 25Pond or garden pond
- 33Tower or big garden feature
- 41Castle tower
- 49Large tower
- 65Huge build — coliseum, dome hall
- 101Mega build — stadium, large temple