How do I make a clean circle in Minecraft?

The surest way is to decide on a diameter and place blocks exactly as a pixel diagram (blueprint) shows. Enter a diameter in this tool and it shows a top-down pixel diagram and a “step pattern” of how many blocks to place sideways on each row, starting from the top row. For example, diameter 21 is 7-2-1-1-1-2-7: place 7 blocks on the top row, go down one row and place 2, then 1, 1, 1, then 2 going vertically, and 7 on the side row. That makes a quarter of the circle, and repeating it four times completes the circle.

Should a Minecraft circle have an odd or even diameter?

An odd diameter is recommended if you want a single-block marker in the center (such as a beacon, a pillar or the middle of a fountain). With a one-block center it’s easy to count symmetrically, and you can extend the same number of blocks north, south, east and west. An even diameter has its center at the corner where four blocks meet, so it suits builds where you want a 2×2 middle (such as a 2×2 pillar or staircase).

How do I build a sphere or dome in Minecraft?

A sphere is a stack of circles of different sizes, one per layer, so you need a pixel diagram for each layer. Choose “Sphere” or “Dome (hemisphere)” in this tool and enter a diameter, and it shows the diagram and block count for each layer, starting from the bottom. Check where the current layer is in the 3D view from above at an angle, and build while comparing with the layer below, shown in light blue, to keep the shape from going off.

How many blocks do I need for a circle with diameter 21 or a sphere with diameter 31?

By this tool’s calculation, a circle with diameter 21 takes 56 blocks as an outline (thin line) and 349 blocks filled. For spheres and domes, the “Quick reference by diameter” table lists counts for diameters 5–64. The blueprint screen also shows the total along with the number of stacks (64), chests (27 slots) and large chests.

What’s the difference between a “thin” and a “thick” outline?

A thin outline connects blocks only at the corners (diagonally) where the row changes, so it uses fewer blocks and looks smooth and round from a distance. A thick outline adds one overlapping block at each step so blocks connect along their faces, making a wall with no breaks. In Minecraft, players and water can’t pass through diagonal gaps, so a thin outline is usually enough.

Can I make arches and ellipses too?

Yes. For an “Arch”, enter the width and height to get a side-view diagram of a half circle (half ellipse), useful for gates, bridges and tunnel entrances. For an “Ellipse”, you can enter the width (east–west) and depth (north–south) separately, so you can make oval ponds, arenas and racetracks. Both let you change the wall thickness.

Can it tell me where to place blocks using in-game coordinates?

Yes. Check the X, Y and Z of the block you want as the center on the F3 debug screen (in Bedrock Edition, turn on “Show Coordinates” in the settings) and enter them under “Coordinates by row”. It lists, row by row from the north, the X coordinate range and Z coordinate to place blocks on. Hovering your finger or mouse over a cell in the diagram also shows that cell’s coordinates.

Minecraft Circle & Sphere Generator | Pixel Diagrams, Step Patterns & Block Counts for Circles, Ellipses, Arches, Spheres, Domes, Cylinders and Cones

The Minecraft Circle & Sphere Generator is a free tool that makes blueprints for round builds in Minecraft (Java Edition and Bedrock Edition). Enter a diameter (odd or even) or a width and height, and it draws circles, ellipses and arches (half circles) as pixel diagrams seen from above or from the side, and spheres, domes (hemispheres), cylinders (towers) and cones (pointed roofs) as one pixel diagram per layer from the bottom up, shown alongside a 3D view from above at an angle. Choose a thin outline (blocks connect at the corners), a thick outline (blocks connect along faces with no gaps), wall thickness, or a filled shape, and for circles it gives the step pattern from the top to the side as a sequence of numbers (how many blocks to place sideways on each row). Enter the center block’s coordinates from the F3 debug screen to see the X and Z ranges to place blocks on each row, and check off blocks as you place them while you build. The block count is converted into stacks (64), chests and shulker boxes, and there is also a quick reference table of block counts for circles, spheres and domes with diameters 5–64.

1. Shape and size

For floors, ponds, tower bases and round plazas. Shown from above.

Diameter (1–160)

blocks

Common sizes:

Diameter 21 (odd): The middle is a single block, so place one marker block at the center and then extend 10 blocks to each side.

Fill the inside?

Line connection

Wall thickness (1–16)

blocks

2. Blueprint (Circle diameter 21 (Outline, thin line))

This is a top view (north is up, east is right). The red frame is the center block, and the scale shows blocks from the center. Tap a cell to mark it as “placed”.

Hover your finger or mouse over a cell to see its position from the center.

Placed blocks: 0 / 56 (56 to go = 56 blocks)

Checks are saved in this browser for each shape.

3. Blocks needed

Counted as 64 per stack, 27 slots per chest and shulker box, and 54 slots per large chest.

Total

56 blocks

Stacks

1 stacks

1 shulker boxes’ worth

Chests

1 large chests

If filled

349 blocks

Count when filled solid

4. Circle step pattern (block arrangement)

This is how many blocks to place sideways on each row of the outline (thin line), going down one row at a time from the top. After 45°, place the same numbers vertically in reverse order to complete a quarter of the circle, and repeat that four times to make the full circle.

Quarter circle for diameter 21 (top → side)

7-2-1-1-1-2-7

Place 7 blocks on the top row (3 each side of the center) → up to 45°: 7-2-1-1, then vertically: 1-2-7.

5. Coordinates by row (this diagram)

Enter the center block’s coordinates from the in-game F3 debug screen (in Bedrock Edition, “Show Coordinates”) to see the coordinate range for placing blocks on each row.

Center XCenter Y (bottom layer)Center Z

Even without coordinates, positions are shown relative to the center block (+ is east/south, − is west/north).

Row (N→S)	X range (from center)	Count
Z -10	-3 to +3 (7 blocks)	7
Z -9	-5 to -4 (2 blocks), +4 to +5 (2 blocks)	4
Z -8	-6 (1 blocks), +6 (1 blocks)	2
Z -7	-7 (1 blocks), +7 (1 blocks)	2
Z -6	-8 (1 blocks), +8 (1 blocks)	2
Z -5	-9 (1 blocks), +9 (1 blocks)	2
Z -4	-9 (1 blocks), +9 (1 blocks)	2
Z -3	-10 (1 blocks), +10 (1 blocks)	2
Z -2	-10 (1 blocks), +10 (1 blocks)	2
Z -1	-10 (1 blocks), +10 (1 blocks)	2
Z 0	-10 (1 blocks), +10 (1 blocks)	2
Z +1	-10 (1 blocks), +10 (1 blocks)	2
Z +2	-10 (1 blocks), +10 (1 blocks)	2
Z +3	-10 (1 blocks), +10 (1 blocks)	2
Z +4	-9 (1 blocks), +9 (1 blocks)	2
Z +5	-9 (1 blocks), +9 (1 blocks)	2
Z +6	-8 (1 blocks), +8 (1 blocks)	2
Z +7	-7 (1 blocks), +7 (1 blocks)	2
Z +8	-6 (1 blocks), +6 (1 blocks)	2
Z +9	-5 to -4 (2 blocks), +4 to +5 (2 blocks)	4
Z +10	-3 to +3 (7 blocks)	7

The same layouts work in both Minecraft Java Edition and Bedrock Edition. This is an unofficial tool and is not affiliated with Mojang Studios or Microsoft. Settings and “placed” checks are only saved in this browser and are never sent to a server.

ABOUT

About Minecraft Circle & Sphere Generator | Pixel Diagrams, Step Patterns & Block Counts for Circles, Ellipses, Arches, Spheres, Domes, Cylinders and Cones

The Minecraft Circle & Sphere Generator makes pixel diagrams (blueprints) for round builds in Minecraft (Java Edition and Bedrock Edition). Enter a diameter and it draws circles, ellipses and arches (half circles) as seen from above or from the side, and spheres, domes (hemispheres), cylinders (towers) and cones (pointed roofs) as one diagram per layer from the bottom up, shown next to a 3D view from above at an angle. Choose a thin outline (blocks connect at the corners), a thick outline (blocks connect along faces with no gaps), wall thickness, or a filled shape, and for circles it gives the step pattern from the top to the side as a sequence of numbers (e.g. diameter 21 is 7-2-1-1-1-2-7). Enter the center block’s coordinates from the F3 debug screen to see the coordinate range to place blocks on each row, and check off blocks you have placed. The block count is converted into stacks (64), chests and shulker boxes, and there is a quick reference table of block counts for circles, spheres and domes with diameters 5–64.

How to use Minecraft Circle & Sphere Generator | Pixel Diagrams, Step Patterns & Block Counts for Circles, Ellipses, Arches, Spheres, Domes, Cylinders and Cones

1Under “Shape and size”, choose the shape you want: circle, ellipse, arch, sphere, dome, cylinder or cone
2Enter the diameter (for ellipses and arches, the width and the depth or height). With an odd number the center is one block; with an even number the center is the corner where four blocks meet
3Choose outline only or filled, thin or thick line, and the wall thickness
4Pick the spot in the game for the red frame on the blueprint (the center block), then place blocks while following the scale (blocks from the center) or the circle’s step pattern
5For spheres, domes, cylinders and cones, use “Layer up ↑” to go one layer at a time, and build while comparing with the layer below, overlaid in light blue
6Enter coordinates from the F3 debug screen under “Coordinates by row” to see the X and Z ranges to place on each row. Tap the cells you have placed to check them off
7Gather materials using the required block, stack and chest counts, and save the blueprint as an image or copy it as text

Great for

I want to lay out a clean circle with a diameter of 21 or 31 on the ground by following a pixel diagram
I want to check whether an odd or even diameter is better and where to put the center
I want to build a glass dome or a sphere house while seeing how many blocks to place on each layer
I want to build a castle that combines round towers (cylinders) with pointed roofs (cones)
I want to make an arch for a gate, bridge or tunnel by choosing its width and height
I want to make an oval pond, an arena or a racetrack
Before building a big sphere or dome, I want to know how many stacks or chests of blocks it takes
In multiplayer, I want to share a blueprint of the shape with friends as a URL or image

Good to know

Each block counts as one cell, and a block is placed in every cell whose center falls inside the shape. A circle with diameter D is exactly D blocks from edge to edge.
A “thin” outline connects blocks at the corners (diagonally), uses fewer blocks and looks rounder. Players and water can’t pass through diagonal gaps, so it works as-is for walls and pond edges. A “thick” outline connects blocks along their faces, adding one overlapping block at each step.
With an odd diameter the middle is a single block, so you can place a marker at the center and extend the same number of blocks to each side. With an even diameter the middle is the corner where four blocks meet, so use the 2×2 in the middle as your marker. The red frame on the diagram is the center block used as the coordinate reference (for even sizes, the southeast one of the four).
Spheres have as many layers as the diameter (domes have half as many), and cones have as many layers as their height, getting smaller toward the top. Domes are shells with an open floor and cones are shells with an open base (cones and cylinders have an option to close the floor).
In Minecraft coordinates, east is +X, south is +Z and up is +Y. The diagram has north at the top and east on the right; on the scale, + is east/south and − is west/north.
Settings and “placed” checks are only saved in this browser (localStorage) and are never sent to a server. This is an unofficial tool and is not affiliated with Mojang Studios or Microsoft.

Questions this tool answers

Use Minecraft Circle & Sphere Generator | Pixel Diagrams, Step Patterns & Block Counts for Circles, Ellipses, Arches, Spheres, Domes, Cylinders and Cones for searches like these:

How to arrange blocks for a clean diameter 21 circle in Minecraft
How to build circles in Minecraft and their step patterns
Whether an odd or even diameter is better for a Minecraft circle
Layer-by-layer blueprints for building spheres and domes in Minecraft
How to build round towers and pointed roofs in Minecraft
Pixel diagrams for making arches and ellipses in Minecraft
Blocks and stacks needed for a sphere in Minecraft
Using a Minecraft circle and sphere generator in English

FAQ

How do I make a clean circle in Minecraft?: The surest way is to decide on a diameter and place blocks exactly as a pixel diagram (blueprint) shows. Enter a diameter in this tool and it shows a top-down pixel diagram and a “step pattern” of how many blocks to place sideways on each row, starting from the top row. For example, diameter 21 is 7-2-1-1-1-2-7: place 7 blocks on the top row, go down one row and place 2, then 1, 1, 1, then 2 going vertically, and 7 on the side row. That makes a quarter of the circle, and repeating it four times completes the circle.
Should a Minecraft circle have an odd or even diameter?: An odd diameter is recommended if you want a single-block marker in the center (such as a beacon, a pillar or the middle of a fountain). With a one-block center it’s easy to count symmetrically, and you can extend the same number of blocks north, south, east and west. An even diameter has its center at the corner where four blocks meet, so it suits builds where you want a 2×2 middle (such as a 2×2 pillar or staircase).
How do I build a sphere or dome in Minecraft?: A sphere is a stack of circles of different sizes, one per layer, so you need a pixel diagram for each layer. Choose “Sphere” or “Dome (hemisphere)” in this tool and enter a diameter, and it shows the diagram and block count for each layer, starting from the bottom. Check where the current layer is in the 3D view from above at an angle, and build while comparing with the layer below, shown in light blue, to keep the shape from going off.
How many blocks do I need for a circle with diameter 21 or a sphere with diameter 31?: By this tool’s calculation, a circle with diameter 21 takes 56 blocks as an outline (thin line) and 349 blocks filled. For spheres and domes, the “Quick reference by diameter” table lists counts for diameters 5–64. The blueprint screen also shows the total along with the number of stacks (64), chests (27 slots) and large chests.
What’s the difference between a “thin” and a “thick” outline?: A thin outline connects blocks only at the corners (diagonally) where the row changes, so it uses fewer blocks and looks smooth and round from a distance. A thick outline adds one overlapping block at each step so blocks connect along their faces, making a wall with no breaks. In Minecraft, players and water can’t pass through diagonal gaps, so a thin outline is usually enough.
Can I make arches and ellipses too?: Yes. For an “Arch”, enter the width and height to get a side-view diagram of a half circle (half ellipse), useful for gates, bridges and tunnel entrances. For an “Ellipse”, you can enter the width (east–west) and depth (north–south) separately, so you can make oval ponds, arenas and racetracks. Both let you change the wall thickness.
Can it tell me where to place blocks using in-game coordinates?: Yes. Check the X, Y and Z of the block you want as the center on the F3 debug screen (in Bedrock Edition, turn on “Show Coordinates” in the settings) and enter them under “Coordinates by row”. It lists, row by row from the north, the X coordinate range and Z coordinate to place blocks on. Hovering your finger or mouse over a cell in the diagram also shows that cell’s coordinates.

Special Thanks

SOLO GUILD | サービス作るAIエンジニア

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