Pixel Circle & Sphere Generator (Minecraft Circles)
Circles, ellipses and spheres block by block, with the count of every row and layer.
Try before you buy.
- Free preview: the grid at preview size (up to 640 pixels) with a watermark, every total, and the first rows of each count table (up to 10).
- Locked until you unlock it: download and copy.
- Unlock: Pro pass, ₹179 for 30 days, a one-time payment that never renews.
Ways to unlock shows how to get the full result.
Printing this result is locked in the free preview.
Shape settings
Result
Point at a block (or select the grid and use the arrow keys) to read its coordinates.
Coordinates count columns and rows from the top left; x and y count blocks from the centre (an even size has two centre blocks, −1 and +1).
Blocks row by row
| Row | Blocks | Columns |
|---|
Layers
| Layer (from the bottom) | Blocks | Width |
|---|
Locked in the free preview. Opens the ways to unlock this result.
Locked in the free preview. Batch runs unlock with a pass.
Locked in the free preview. Query results unlock with a pass.
About the Pixel Circle & Sphere Generator (Minecraft Circles)
Plan round builds block by block. Choose a circle or an ellipse from 1 to 512 blocks across, or a sphere, dome, cylinder or cone in layers, and the grid shows exactly which blocks to place, with the number of blocks in every row and every layer, the centre marked, and the coordinates of the block under your pointer. Outlines can be any number of blocks thick.
Three drawing rules cover what builders need: Thin gives the smoothest line, Thick a solid wall with no diagonal gaps, and Bresenham-style the classic one-block line of the midpoint circle algorithm. Every shape is worked out in your browser and is exactly symmetric.
How to use it
- Choose the shape and its diameter in blocks (an ellipse has a width and a height; a cylinder or cone a height in layers).
- Choose Outline (or Hollow for 3D shapes) with a thickness, or Filled / Solid, and the drawing rule: Thin, Thick or Bresenham-style.
- Read the grid: the centre lines cross at the middle (an even size has two centre blocks), the table lists the blocks of every row, and pointing at a block shows its column, row and distance from the centre.
- For a sphere, dome, cylinder or cone, step through the layers from the bottom up; the Layers table gives each layer’s block count and width.
- Download the layer as PNG or SVG, the block coordinates as CSV, or copy the counts — with a Pro pass or after unlocking this shape; without one you see the free preview.
Examples
Circle · diameter 7 · Filled
37 blocks; rows 3 – 5 – 7 – 7 – 7 – 5 – 3
Circle · diameter 7 · Outline 1 · Thin, Thick or Bresenham-style
Thin: 16 blocks · Thick: 24 blocks (no diagonal gaps) · Bresenham-style: 16 blocks
Circle · diameter 8 · Filled
52 blocks; rows 4 – 6 – 8 – 8 – 8 – 8 – 6 – 4, around a two-block centre
Sphere · diameter 3 · Solid
19 blocks in 3 layers: 5, 9 and 5
Common uses
- Building round towers, domes, fountains, arenas and planets in Minecraft and other block games.
- Drawing clean circles and ellipses for pixel art, cross-stitch, mosaics, LEGO and perler-bead designs.
- Counting the blocks or beads a round build needs before you gather them.
- Teaching how a computer draws a circle with whole pixels.
The three drawing rules
- Thin and Thick start from the filled shape: a block belongs to it when its centre lies inside the circle (or ellipse, sphere, cylinder or cone). An outline is the filled shape minus the shape shrunk by the thickness.
- Thin shrinks through the four side neighbours of each block (six in 3D), so the outline steps diagonally: the smoothest look, but blocks touch only at their corners on the diagonals.
- Thick shrinks through all eight neighbours (twenty-six in 3D), so every block of the outline touches the next one along a side: a solid wall you cannot see or walk through diagonally.
- Bresenham-style is the classic computer-graphics circle: in each column where the curve is flatter than 45°, and in each row where it is steeper, it takes the block whose centre is nearest the circle through the outermost block centres (Bresenham, Communications of the ACM). The line is always one block wide; for 3D shapes choose Thin or Thick.
Building a circle in a block game
- Start at the centre: lay the centre lines first (one block for an odd diameter, two for an even one), then count out the first row from the table.
- Build one quarter and mirror it: every shape here is exactly symmetric left to right and top to bottom.
- Odd diameters (7, 9, 11 …) have a single centre block, which suits a fountain or a pillar in the middle; even ones (8, 10, 12 …) have a two-block centre, which suits a doorway in the middle of a wall.
- For a sphere or dome, build layer by layer from the bottom and check each layer’s count in the Layers table; a dome is the top half of the sphere of the same diameter.
Coordinates and the CSV file
Columns and rows are counted from the top-left corner, starting at 1. x and y count blocks from the centre: x to the right and y upwards, as in most builds. With an even size there is no block on the centre line, so the two centre blocks are −1 and +1. The CSV file lists one block per line (with its layer for 3D shapes), for spreadsheets and scripts.
Limitations
- Sizes from 1 to 512 blocks, outlines and shells up to 64 blocks thick.
- The Bresenham-style rule is for flat circles and ellipses; spheres, domes, cylinders and cones use Thin or Thick.
- A CSV file holds at most 2,000,000 blocks; for very large solid shapes download one layer at a time.
- Shapes are circles and ellipses and the 3D shapes built from them; other curves and polygons are not drawn.
Privacy
Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot.
Frequently asked questions
What do I get without a pass?
Without a pass, Pixel Circle & Sphere Generator (Minecraft Circles) shows the grid at preview size (up to 640 pixels) with a watermark, every total, and the first rows of each count table (up to 10). Until you unlock it, the result can’t be downloaded or copied. A Pro, Premium or Ultimate pass, a one-time payment that never renews, unlocks the full result. The pricing page lists the passes and their prices.
What is the difference between thin and thick circles?
A thin circle touches at the corners on its diagonals, which looks smoothest; a thick circle adds the blocks that fill those corners, so the wall has no diagonal gaps. A 7-block circle has 16 blocks thin and 24 blocks thick.
Should I use an odd or an even diameter?
Odd diameters have one centre block and even ones a two-block centre. Pick odd when something stands in the middle (a pillar, a beacon) and even when two things meet there (a double door, a path two blocks wide).
How do I build a sphere?
Choose Sphere, set the diameter, and step through the layers from the bottom: each layer is a circle with its own block count. Hollow gives a closed shell; the thickness sets how many blocks thick it is.
Why does a small circle look square?
With so few blocks there is not enough room for a curve: a filled circle 3 blocks across fills the whole 3 × 3 square by the block-centre rule, and the Bresenham-style rule draws it as a plus shape. Circles start to look round from about 7 blocks across.
Do I need a pass?
To download, copy or print the full result, yes: a Pro pass unlocks every Pro tool. Without a pass you see a free preview of your own shape: the grid at preview size with a watermark, every total and the first rows of the counts.
Is anything uploaded?
No. Every shape is worked out in your browser, and the page works offline once it has loaded.