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CraftShape

100 Block Circle Generator

One hundred blocks across is a landmark-scale circle: a stadium, a city wall or a crater rim. Almost nobody builds this by eye. Work from the row instructions, one quadrant at a time.

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

100 x 100 · 304 blocks

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

Build summary

Diameter
100
Radius
50.0
Total blocks
304
Rows used
100

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 43 spaces, place 14 blocks
  2. Row 2:skip 38 spaces, place 5 blocks, leave 14 spaces, place 5 blocks
  3. Row 3:skip 34 spaces, place 4 blocks, leave 24 spaces, place 4 blocks
  4. Row 4:skip 32 spaces, place 3 blocks, leave 30 spaces, place 3 blocks
  5. Row 5:skip 29 spaces, place 3 blocks, leave 36 spaces, place 3 blocks
  6. Row 6:skip 27 spaces, place 2 blocks, leave 42 spaces, place 2 blocks
  7. Row 7:skip 25 spaces, place 2 blocks, leave 46 spaces, place 2 blocks
  8. Row 8:skip 24 spaces, place 2 blocks, leave 48 spaces, place 2 blocks
  9. Row 9:skip 22 spaces, place 2 blocks, leave 52 spaces, place 2 blocks
  10. Row 10:skip 21 spaces, place 1 block, leave 56 spaces, place 1 block
  11. Row 11:skip 19 spaces, place 2 blocks, leave 58 spaces, place 2 blocks
  12. Row 12:skip 18 spaces, place 2 blocks, leave 60 spaces, place 2 blocks
  13. Row 13:skip 17 spaces, place 1 block, leave 64 spaces, place 1 block
  14. Row 14:skip 16 spaces, place 1 block, leave 66 spaces, place 1 block
  15. Row 15:skip 15 spaces, place 1 block, leave 68 spaces, place 1 block
  16. Row 16:skip 14 spaces, place 1 block, leave 70 spaces, place 1 block
  17. Row 17:skip 13 spaces, place 1 block, leave 72 spaces, place 1 block
  18. Row 18:skip 12 spaces, place 1 block, leave 74 spaces, place 1 block
  19. Row 19:skip 11 spaces, place 1 block, leave 76 spaces, place 1 block
  20. Row 20:skip 10 spaces, place 2 blocks, leave 76 spaces, place 2 blocks
  21. Row 21:skip 10 spaces, place 1 block, leave 78 spaces, place 1 block
  22. Row 22:skip 9 spaces, place 1 block, leave 80 spaces, place 1 block
  23. Row 23:skip 8 spaces, place 1 block, leave 82 spaces, place 1 block
  24. Row 24:skip 8 spaces, place 1 block, leave 82 spaces, place 1 block
  25. Row 25:skip 7 spaces, place 1 block, leave 84 spaces, place 1 block
  26. Row 26:skip 6 spaces, place 2 blocks, leave 84 spaces, place 2 blocks
  27. Row 27:skip 6 spaces, place 1 block, leave 86 spaces, place 1 block
  28. Row 28:skip 5 spaces, place 1 block, leave 88 spaces, place 1 block
  29. Row 29:skip 5 spaces, place 1 block, leave 88 spaces, place 1 block
  30. Row 30:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  31. Row 31:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  32. Row 32:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  33. Row 33:skip 3 spaces, place 1 block, leave 92 spaces, place 1 block
  34. Row 34:skip 3 spaces, place 1 block, leave 92 spaces, place 1 block
  35. Row 35:skip 2 spaces, place 2 blocks, leave 92 spaces, place 2 blocks
  36. Row 36:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  37. Row 37:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  38. Row 38:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  39. Row 39:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  40. Row 40:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  41. Row 41:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  42. Row 42:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  43. Row 43:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  44. Row 44:place 1 block, leave 98 spaces, place 1 block
  45. Row 45:place 1 block, leave 98 spaces, place 1 block
  46. Row 46:place 1 block, leave 98 spaces, place 1 block
  47. Row 47:place 1 block, leave 98 spaces, place 1 block
  48. Row 48:place 1 block, leave 98 spaces, place 1 block
  49. Row 49:place 1 block, leave 98 spaces, place 1 block
  50. Row 50:place 1 block, leave 98 spaces, place 1 block
  51. Row 51:place 1 block, leave 98 spaces, place 1 block
  52. Row 52:place 1 block, leave 98 spaces, place 1 block
  53. Row 53:place 1 block, leave 98 spaces, place 1 block
  54. Row 54:place 1 block, leave 98 spaces, place 1 block
  55. Row 55:place 1 block, leave 98 spaces, place 1 block
  56. Row 56:place 1 block, leave 98 spaces, place 1 block
  57. Row 57:place 1 block, leave 98 spaces, place 1 block
  58. Row 58:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  59. Row 59:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  60. Row 60:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  61. Row 61:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  62. Row 62:skip 1 space, place 1 block, leave 96 spaces, place 1 block
  63. Row 63:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  64. Row 64:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  65. Row 65:skip 2 spaces, place 1 block, leave 94 spaces, place 1 block
  66. Row 66:skip 2 spaces, place 2 blocks, leave 92 spaces, place 2 blocks
  67. Row 67:skip 3 spaces, place 1 block, leave 92 spaces, place 1 block
  68. Row 68:skip 3 spaces, place 1 block, leave 92 spaces, place 1 block
  69. Row 69:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  70. Row 70:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  71. Row 71:skip 4 spaces, place 1 block, leave 90 spaces, place 1 block
  72. Row 72:skip 5 spaces, place 1 block, leave 88 spaces, place 1 block
  73. Row 73:skip 5 spaces, place 1 block, leave 88 spaces, place 1 block
  74. Row 74:skip 6 spaces, place 1 block, leave 86 spaces, place 1 block
  75. Row 75:skip 6 spaces, place 2 blocks, leave 84 spaces, place 2 blocks
  76. Row 76:skip 7 spaces, place 1 block, leave 84 spaces, place 1 block
  77. Row 77:skip 8 spaces, place 1 block, leave 82 spaces, place 1 block
  78. Row 78:skip 8 spaces, place 1 block, leave 82 spaces, place 1 block
  79. Row 79:skip 9 spaces, place 1 block, leave 80 spaces, place 1 block
  80. Row 80:skip 10 spaces, place 1 block, leave 78 spaces, place 1 block
  81. Row 81:skip 10 spaces, place 2 blocks, leave 76 spaces, place 2 blocks
  82. Row 82:skip 11 spaces, place 1 block, leave 76 spaces, place 1 block
  83. Row 83:skip 12 spaces, place 1 block, leave 74 spaces, place 1 block
  84. Row 84:skip 13 spaces, place 1 block, leave 72 spaces, place 1 block
  85. Row 85:skip 14 spaces, place 1 block, leave 70 spaces, place 1 block
  86. Row 86:skip 15 spaces, place 1 block, leave 68 spaces, place 1 block
  87. Row 87:skip 16 spaces, place 1 block, leave 66 spaces, place 1 block
  88. Row 88:skip 17 spaces, place 1 block, leave 64 spaces, place 1 block
  89. Row 89:skip 18 spaces, place 2 blocks, leave 60 spaces, place 2 blocks
  90. Row 90:skip 19 spaces, place 2 blocks, leave 58 spaces, place 2 blocks
  91. Row 91:skip 21 spaces, place 1 block, leave 56 spaces, place 1 block
  92. Row 92:skip 22 spaces, place 2 blocks, leave 52 spaces, place 2 blocks
  93. Row 93:skip 24 spaces, place 2 blocks, leave 48 spaces, place 2 blocks
  94. Row 94:skip 25 spaces, place 2 blocks, leave 46 spaces, place 2 blocks
  95. Row 95:skip 27 spaces, place 2 blocks, leave 42 spaces, place 2 blocks
  96. Row 96:skip 29 spaces, place 3 blocks, leave 36 spaces, place 3 blocks
  97. Row 97:skip 32 spaces, place 3 blocks, leave 30 spaces, place 3 blocks
  98. Row 98:skip 34 spaces, place 4 blocks, leave 24 spaces, place 4 blocks
  99. Row 99:skip 38 spaces, place 5 blocks, leave 14 spaces, place 5 blocks
  100. Row 100:skip 43 spaces, place 14 blocks

Block counts for a 100 block circle

  • Hollow outline (1 block wall): 304 blocks
  • Filled disc: 7,860 blocks
  • Widest row: 100 blocks
  • Center: a 2x2 center square

Building advice for this size

  • Treat it as four separate builds. Complete one quadrant fully, then mirror it — checking 25 rows is much easier than 100.
  • Expect around five stacks for the outline and roughly 123 stacks for a filled floor.
  • Use a temporary straight line across the full diameter as a reference while you place the arcs.
  • Because the curve is so gradual, runs of 20+ identical blocks are normal near the top and bottom of the ring.

Other circle sizes

Smaller: 64 block circle. Or open the full circle generator for any diameter up to 256.

Frequently asked questions

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