15 block circle in Minecraft (radius 7)
A 15-block-wide circle takes 40 blocks for a 1-block outline and 177 to fill it. Go around each quarter in runs of 5·2·1·2·5. The centre is a single block, because 15 is odd.
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| Diameter | 15 blocks (radius 7 from the centre block) |
| Outline, thin wall (diagonal steps) | 40 |
| Outline, thick wall (no diagonal gaps) | 56 |
| Filled disc | 177 |
| Flat edge on each side | 5 |
| 5-high tower wall | 200 · 3×64 + 8 |
Rule: a block counts when its centre lies inside the circle, the same grid the game uses. Checked 21 Oct 2026.
How to build it
- Mark the centre block. Count 7 blocks out from the centre block in all four directions and mark those four points.
- Place the four flat edges of 5. Centre each flat edge on one of the four points: 2 blocks either side of it.
- Fill each corner with 2·1·2. After each run, step one block diagonally inward and place the next run. Do the same in all four corners.
- Repeat for each layer. A straight wall is the same ring on every layer (a 5-high wall takes 200 blocks). A dome or sphere shrinks the ring as it goes up.
All 15 rows, north to south
Each row lists its runs of blocks from west to east; "2-2" means 2 blocks, a gap, then 2 blocks.
- 5
- 2-2
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 1-1
- 2-2
- 5
Nearby sizes
| Diameter | Outline | Filled | Quarter pattern |
|---|---|---|---|
| 12 | 32 | 112 | 4-2-2-4 |
| 13 | 36 | 137 | 5-2-2-5 |
| 14 | 36 | 156 | 6-1-1-1-6 |
| 15 | 40 | 177 | 5-2-1-2-5 |
| 16 | 44 | 208 | 6-2-1-2-6 |
| 17 | 48 | 225 | 5-2-2-1-2-5 |
| 18 | 48 | 256 | 6-2-1-1-2-6 |
Every size from 5 to 128 in one table · How to build a perfect circle
Questions
How many blocks is a 15 block circle?
40 blocks for a 1-block outline with diagonal steps, 56 for an outline with no diagonal gaps, and 177 for a filled disc.
Should I build 15 or 14?
15 is odd, so the circle has one centre block: doors, beacons and pillars line up with the middle. 14 has a 2×2 centre instead.
How many blocks for a 15 sphere or dome?
A hollow 15 block sphere with a 1-block shell takes 530 blocks; a hollow 15 dome (8 layers, open at the bottom) takes 285. Plan them layer by layer in the sphere generator or the dome generator.
Thin or thick outline?
A thin outline (40 blocks) steps diagonally, so mobs and water can slip through the corners. A thick outline (56 blocks) adds a block at every step, which makes a sealed wall.