Skip to content
CraftShape

40 Block Circle Generator

A 40 block circle is a serious footprint. The arcs are long and gentle, which means the row instructions matter more than your eye does — a single misplaced block in a 6 long run is visible from a distance.

Controls

Dimensions

Dimensions

blocks

This page is preset to one size — change it freely to explore others.

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

Block counts for a 40 block circle

  • Hollow outline (1 block wall): 140 blocks
  • Filled disc: 1,264 blocks
  • Widest row: 40 blocks
  • Center: a 2x2 center square

Building advice for this size

  • Break the ring into four quadrants and build them one at a time, checking each against the blueprint before moving on.
  • Reserve about two and a quarter stacks of blocks for a 1 thick ring, and around nine stacks for a 3 thick wall.
  • Place a temporary line of blocks across the diameter while building so you can confirm both halves match.
  • This size works well as the base of a dome roughly 20 blocks tall, or as the outer wall of a two-storey round hall.

Other circle sizes

Smaller: 30 block circle. Larger: 50 block circle. Or open the full circle generator for any diameter up to 256.

Frequently asked questions

Related generators