SPHERE · DOME · LAYER BY LAYER
Minecraft Sphere Generator
Enter a diameter and this Minecraft sphere generator shows your sphere or dome layer by layer, with the block count for every layer and the whole build. Step through the layers with the slider, see the layer below faded underneath, and build a smooth sphere in Survival without guessing. Free in your browser.
Runs in your browser. Nothing to download, and no seed needed.
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About the Sphere Generator
Spheres and domes are some of the hardest shapes to build in Minecraft. Each horizontal layer is a different circle, and one wrong ring makes the whole shape look lumpy. A sphere generator works out every layer for you, so you only have to copy one flat circle at a time.
What you get on this page:
- Sphere or dome: a full ball, or just the top half for roofs and biodomes
- Hollow or filled: hollow counts are the blocks you actually place
- Layer by layer: a slider for every layer, with the width and block count
- Faded layer below: line each ring up with the one under it
- WorldEdit command: for quick builds in Creative or on servers
How to Use the Sphere Generator
Step 1: Set the Diameter
Type the width of the sphere in blocks, from 1 to 128. Odd sizes like 15, 21 or 31 have a single center block and are easiest to build.
Step 2: Pick Sphere or Dome
Choose Sphere for a full ball, or Dome for the top half. Layer 1 of a dome is the widest ring at the base.
Step 3: Choose Hollow or Filled
Hollow gives a one block thick shell. Filled gives a solid ball, which takes many more blocks.
Step 4: Build Layer by Layer
Start at layer 1 and move the slider up after each layer. The green squares are the current layer, and the faded squares show the layer below so you can line them up.
Sphere Block Counts
| Diameter | Hollow sphere | Filled sphere | Hollow dome |
|---|---|---|---|
| 9 | 186 | 389 | 105 |
| 15 | 530 | 1791 | 285 |
| 21 | 1082 | 4945 | 569 |
| 31 | 2382 | 15515 | 1233 |
| 51 | 6642 | 69599 | 3393 |
A hollow 21 block sphere needs about 17 stacks of blocks. Check the tool for any other size.
Building a Sphere or Dome by Hand
Mark the Center Column First
Place a tall pillar of a temporary block at the center. Every layer is measured from it, and you remove it at the end.
Build From the Widest Layer Outward
For a dome, start with the base ring, which is the widest. For a full sphere, many builders start at the equator and build up and down from there.
Use the Faded Layer Below
Each new ring sits right on top of or just inside the last one. The faded squares show where the previous layer was, so you can see which blocks shift inward.
Use Scaffolding
Big spheres need a way up. Scaffolding is quick to place and easy to remove. Build the floor of the sphere first if you want a room inside.
Odd vs Even Diameters
Odd widths have one center block, so the sphere sits neatly around a single column. Even widths have a 2 × 2 center, which is harder to measure but lines up with even-sized builds.
Hollow vs Filled
For almost every build, use hollow. A filled 31 block sphere takes more than 15,000 blocks, while the hollow version takes about 2,400. Filled spheres are mostly for terraforming, like a round hill or a planet in a space build.
Minecraft Sphere Command
| Command | Result |
|---|---|
| //hsphere stone 10 | Hollow sphere, 21 blocks wide |
| //sphere stone 10 | Filled sphere, 21 blocks wide |
| //hsphere glass 15 | Glass biodome shell, 31 blocks wide |
These are WorldEdit commands. The radius 10 makes a 21 block sphere because WorldEdit counts the center block. To get a dome, make the sphere and delete the bottom half, or build the dome layers from this guide. Vanilla Minecraft has no sphere command.
Sphere Ideas
- Glass biodome: a hollow glass dome over a farm or a base in the ocean
- Planet build: a filled sphere with ores and grass on top
- Wizard tower top: a small dome on a round tower
- Underwater base: a hollow glass sphere, drained with sponges
- Beacon or spawner room: a dome over the center block
For flat round shapes like floors and walls, use the circle generator.
Related Minecraft Tools
These tools pair well with this one:
- Minecraft Seed Map: the full map with every biome and structure
- 3D Seed Viewer: See your seed in 3D
- Chunk Calculator: Block, chunk and region coordinates
- Enchantment Calculator: Cheapest anvil order for your books
- XP Calculator: Levels, XP points and bottles
Frequently Asked Questions
How do I make a sphere in Minecraft?
Pick a diameter in the sphere generator, then build one layer at a time from the bottom, copying each ring from the grid. Mark the center column first so every ring stays centered.
How do I make a small sphere?
Small spheres like 5 to 9 blocks wide only have a few layers. Use the generator with a small odd size and follow each layer. Below 5 blocks, a sphere looks more like a plus shape or a cube.
How many blocks do I need for a sphere?
A hollow 15 block sphere needs 530 blocks, and a hollow 21 block sphere needs 1082. The generator shows the total for any size and for each layer.
Does it work on Bedrock?
Yes. Spheres are just block patterns, so they work on Java, Bedrock and every version.
Can I make a dome instead of a full sphere?
Yes. Choose Dome to get only the top half, starting with the widest ring at the base.
Final Thoughts
A sphere generator turns one of the toughest builds in Minecraft into a series of simple circles. Pick a size, choose sphere or dome, and move the slider one layer at a time. Mark the center, gather the blocks the counter shows, and your dome or sphere will come out smooth and round.
