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CraftShape

15 Block Circle Generator

Fifteen is an odd diameter, so this circle has one true center block. That makes it the easiest small size to lay out in survival: stand on the center, count seven blocks in each direction, then join the ends.

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

15 x 15 · 40 blocks

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

Build summary

Diameter
15
Radius
7.5
Total blocks
40
Rows used
15

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 5 spaces, place 5 blocks
  2. Row 2:skip 3 spaces, place 2 blocks, leave 5 spaces, place 2 blocks
  3. Row 3:skip 2 spaces, place 1 block, leave 9 spaces, place 1 block
  4. Row 4:skip 1 space, place 1 block, leave 11 spaces, place 1 block
  5. Row 5:skip 1 space, place 1 block, leave 11 spaces, place 1 block
  6. Row 6:place 1 block, leave 13 spaces, place 1 block
  7. Row 7:place 1 block, leave 13 spaces, place 1 block
  8. Row 8:place 1 block, leave 13 spaces, place 1 block
  9. Row 9:place 1 block, leave 13 spaces, place 1 block
  10. Row 10:place 1 block, leave 13 spaces, place 1 block
  11. Row 11:skip 1 space, place 1 block, leave 11 spaces, place 1 block
  12. Row 12:skip 1 space, place 1 block, leave 11 spaces, place 1 block
  13. Row 13:skip 2 spaces, place 1 block, leave 9 spaces, place 1 block
  14. Row 14:skip 3 spaces, place 2 blocks, leave 5 spaces, place 2 blocks
  15. Row 15:skip 5 spaces, place 5 blocks

Block counts for a 15 block circle

  • Hollow outline (1 block wall): 40 blocks
  • Filled disc: 177 blocks
  • Widest row: 15 blocks
  • Center: one single center block

Building advice for this size

  • Mark the center block, then measure 7 blocks north, south, east and west. Those four points are the widest rows and columns.
  • The corner arcs are where hand-built circles go wrong. Copy the exact run lengths from the row instructions instead of eyeballing them.
  • 15 wide is a comfortable house footprint: the interior is 13 across, enough for furniture along the walls and a table in the middle.
  • If you plan to dome this circle later, keep the diameter odd so the dome crown also lands on a single block.

Other circle sizes

Smaller: 10 block circle. Larger: 20 block circle. Or open the full circle generator for any diameter up to 256.

Frequently asked questions

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