MINECRAFT DOME GENERATOR
Generate pixel-perfect Minecraft dome blueprints with exact block counts. Hollow or filled, layer-by-layer plans, 3D preview — free, no signup, runs in your browser.
Each square is one block. Tap a row to see its placement instructions.
Cyan = selected row · green check = done
Drag to rotate · scroll to zoom · cyan = current layer
Tap a row on the blueprint to get exact placement coordinates.
Progress saves in this browser, separately for each shape, size and style. Coordinates start at the center block of the plan.
How to Build a Dome in Minecraft
- 01
Pick an odd diameter
Odd sizes (15, 21, 31…) give your dome a single center block and a clean apex. The size chart below shows exact block counts.
- 02
Generate the dome blueprint
The tool presets shape = dome. Each layer of your dome gets its own 2D plan, from the wide equator to the cap.
- 03
Start at the widest layer
Domes have an open base. Place the bottom (widest) ring first — it defines the silhouette. Check it from a distance before stacking.
- 04
Stack upward, row by row
Switch layers with the layer picker. Use Build Along for exact X/Z coordinates per row and mark rows done — progress saves in your browser.
- 05
Cap it and inspect in 3D
The last layer is a single block (or a 2×2 cap for even sizes). Drag the 3D preview to verify the curve before you commit materials.
Dome Size Chart
Block counts computed live with the generator algorithm.
| Diameter | Layers | Hollow blocks | Filled blocks |
|---|---|---|---|
| 15 | 8 | 285(4 st + 29) | 984 |
| 21 | 11 | 569(8 st + 57) | 2,647 |
| 31 | 16 | 1,233(19 st + 17) | 8,132 |
| 41 | 21 | 2,177(34 st + 1) | 18,725 |
| 51 | 26 | 3,393(53 st + 1) | 35,826 |
Dome vs Sphere
A dome is the upper half of a sphere with an open base — ideal for roofs, arenas and observatories. A sphere is the full ball, closed top and bottom. Need the full ball instead? Use the sphere generator.
Open the Minecraft Sphere Generator →Frequently Asked Questions
How many blocks do I need for a Minecraft dome?
It depends on diameter and mode. A hollow dome at diameter 21 uses 569 blocks; filled uses 2,647. At diameter 31: 1,233 hollow / 8,132 filled. The materials card always shows the exact count plus stacks of 64.
Does the dome have a floor or base?
No — domes are open at the bottom by design, so you can walk inside and add your own floor. The bottom layer is the widest ring of the structure.
Hollow or filled dome — which should I pick?
Hollow for roofs and buildings you will enter (far fewer blocks). Filled for solid terrain blobs or when you plan to carve the interior yourself.
What is the biggest dome I can generate?
The 2D blueprints work up to diameter 512. The interactive 3D preview supports domes up to 64 blocks wide.
Is this a dome calculator with layer-by-layer plans?
Yes. Enter a diameter and every layer of the dome gets its own 2D plan with exact row coordinates and a live block count — the materials card acts as the calculator, showing total blocks plus stacks of 64.
Does it work for Minecraft Bedrock? Can I dome an Ocean Monument?
Bedrock and Java use identical block placement, so the blueprint works in both. For an Ocean Monument build (the monument is 58 blocks wide), generate a dome one or two sizes larger — 59 or 61 — so the rim clears the structure before you start draining.
Can I build a dome with WorldEdit or commands?
Yes, if cheats are on — WorldEdit's //sphere variants or Bedrock /fill chains work instantly. This generator is built for survival play: no mods, no commands, just a layer-by-layer plan and block counts you can trust.
Need a flat circle instead? Open the MC Circle Generator →
Related Tools & Guides
Circle Generator
Build flat circles for towers, wells, and arenas
Sphere Generator
Build full 3D spheres layer by layer
Dome Generator
Open-base hemispheres for roofs and arenas
Circle Chart
Quick reference table for common circle sizes
Circle Building Guide
Step-by-step method for perfect circles
Sphere Building Guide
Layer-by-layer sphere and dome walkthrough