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CraftShape

Minecraft Circle Generator

Choose a diameter, pick hollow or filled, and get a symmetrical circle blueprint with the exact block count and a row-by-row build order. Everything is calculated in your browser as you type.

Controls

Dimensions

Dimensions

blocks

Odd diameters have a single center block, even ones a 2x2 core.

blocks

Always exactly half the diameter. An odd diameter has a half-block radius but still uses one single centre block.

Walls

Walls

Fill mode
blocks
Appearance

Appearance

Block color

Mirror mode shows one quadrant only. Build it, then mirror it left/right and front/back for a perfectly symmetrical shape.

Circle Generator

40 x 40 · 140 blocks

Drag to pan, scroll or pinch to zoom, hover a cell for coordinates.

Build summary

Diameter
40
Radius
20.0
Total blocks
140
Rows used
40

Symmetry check: mirrors left to right and mirrors top to bottom.

Ring built between the outer edge and an inner edge 1 block inside it.

Row-by-row instructions

  1. Row 1:skip 16 spaces, place 8 blocks
  2. Row 2:skip 12 spaces, place 4 blocks, leave 8 spaces, place 4 blocks
  3. Row 3:skip 10 spaces, place 3 blocks, leave 14 spaces, place 3 blocks
  4. Row 4:skip 9 spaces, place 2 blocks, leave 18 spaces, place 2 blocks
  5. Row 5:skip 7 spaces, place 2 blocks, leave 22 spaces, place 2 blocks
  6. Row 6:skip 6 spaces, place 2 blocks, leave 24 spaces, place 2 blocks
  7. Row 7:skip 5 spaces, place 2 blocks, leave 26 spaces, place 2 blocks
  8. Row 8:skip 4 spaces, place 2 blocks, leave 28 spaces, place 2 blocks
  9. Row 9:skip 4 spaces, place 1 block, leave 30 spaces, place 1 block
  10. Row 10:skip 3 spaces, place 1 block, leave 32 spaces, place 1 block
  11. Row 11:skip 2 spaces, place 2 blocks, leave 32 spaces, place 2 blocks
  12. Row 12:skip 2 spaces, place 1 block, leave 34 spaces, place 1 block
  13. Row 13:skip 1 space, place 2 blocks, leave 34 spaces, place 2 blocks
  14. Row 14:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  15. Row 15:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  16. Row 16:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  17. Row 17:place 1 block, leave 38 spaces, place 1 block
  18. Row 18:place 1 block, leave 38 spaces, place 1 block
  19. Row 19:place 1 block, leave 38 spaces, place 1 block
  20. Row 20:place 1 block, leave 38 spaces, place 1 block
  21. Row 21:place 1 block, leave 38 spaces, place 1 block
  22. Row 22:place 1 block, leave 38 spaces, place 1 block
  23. Row 23:place 1 block, leave 38 spaces, place 1 block
  24. Row 24:place 1 block, leave 38 spaces, place 1 block
  25. Row 25:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  26. Row 26:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  27. Row 27:skip 1 space, place 1 block, leave 36 spaces, place 1 block
  28. Row 28:skip 1 space, place 2 blocks, leave 34 spaces, place 2 blocks
  29. Row 29:skip 2 spaces, place 1 block, leave 34 spaces, place 1 block
  30. Row 30:skip 2 spaces, place 2 blocks, leave 32 spaces, place 2 blocks
  31. Row 31:skip 3 spaces, place 1 block, leave 32 spaces, place 1 block
  32. Row 32:skip 4 spaces, place 1 block, leave 30 spaces, place 1 block
  33. Row 33:skip 4 spaces, place 2 blocks, leave 28 spaces, place 2 blocks
  34. Row 34:skip 5 spaces, place 2 blocks, leave 26 spaces, place 2 blocks
  35. Row 35:skip 6 spaces, place 2 blocks, leave 24 spaces, place 2 blocks
  36. Row 36:skip 7 spaces, place 2 blocks, leave 22 spaces, place 2 blocks
  37. Row 37:skip 9 spaces, place 2 blocks, leave 18 spaces, place 2 blocks
  38. Row 38:skip 10 spaces, place 3 blocks, leave 14 spaces, place 3 blocks
  39. Row 39:skip 12 spaces, place 4 blocks, leave 8 spaces, place 4 blocks
  40. Row 40:skip 16 spaces, place 8 blocks

How the circle blueprint is calculated

Minecraft has no curves — only cubes. A circle blueprint is really a decision for every cell in a square grid: is this cell inside the circle or outside it? CraftShape answers that by testing the center of each cell against the circle boundary. Cells whose centers fall inside are placed; cells whose centers fall outside are left empty.

That single rule is what keeps the result symmetrical. Because the test is measured from the exact middle of the shape, the left half always mirrors the right half and the top always mirrors the bottom — for odd and even diameters alike. The summary panel runs that symmetry check on the finished grid and reports the result.

Hollow circles and wall thickness

A hollow circle is the area between two circles: the diameter you asked for, and a smaller one shrunk by your wall thickness. Every cell inside the outer circle but outside the inner one becomes a block. This is why a thicker wall never leaves gaps in the curve — the band is always continuous.

Building it in game

  • Flatten the area first. Uneven ground is the most common reason a circle looks wrong.
  • Place the widest row and the widest column first, then fill the four arcs between them.
  • Use mirror mode to build one quadrant and copy it — checking a quarter of the shape is much faster than checking all of it.
  • Stack the same ring for every layer of height to turn a circle into a tower.

Popular circle sizes

Preconfigured pages with block counts and advice for the sizes builders ask for most:

Frequently asked questions

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