51 Block Sphere in Minecraft: Layers and Count

How to use it

Look at the bottom layer in the tool, then use Next to move up.
Build each layer completely before starting the next one.
Use the faint outline of the layer below as your guide.
Stop at layer 51. The layers above the middle mirror the ones below it.

The 51 block sphere in numbers

Fifty one blocks is a monument. Plan the material first. Even the hollow version needs over a hundred stacks, so gather before you start.

The solid version holds 69,599 blocks. The ideal volume of a ball this wide is about 69,456, so the blocky version is 0.2 per cent larger. The hollow shell is 10 per cent of the solid count, which is why almost every sphere you see in a build is hollow.

Style	Blocks	Stacks of 64
Hollow, thin shell	6,642	103 stacks + 50
Hollow, thick shell	11,642	181 stacks + 58
Solid	69,599	1087 stacks + 31

Blocks in every layer

The table lists the first 26 layers from the bottom. The top half is the same list in reverse. The widest layer, the equator, has 2,053 blocks when solid and 144 when hollow.

Layer	Solid	Hollow
1	81	81
2	241	160
3	377	136
4	517	140
5	665	148
6	793	128
7	901	108
8	1,033	132
9	1,129	104
10	1,237	120
11	1,353	116
12	1,433	120
13	1,505	124
14	1,597	124
15	1,653	128
16	1,741	132
17	1,789	132
18	1,861	136
19	1,893	136
20	1,933	140
21	1,961	140
22	2,001	140
23	2,025	140
24	2,025	140
25	2,029	144
26	2,053	144

Centre and equator

With an odd diameter the sphere has one centre block and one equator layer, layer 26. A pillar of 51 blocks through the centre lets you mark every layer. The bottom layer is a small disc of 81 blocks, and the radius grows quickly in the first few layers, then slowly near the middle.

How to build it

Work from the bottom up. Finish each layer, then check it against the faint outline of the one below. For hollow spheres, leave the inside empty and fill only the first layer if you want a floor. Mark the layer numbers on a pillar or a sign so you never lose your place. In survival, collect 103 stacks + 50 for the thin shell, and a few extra stacks of scaffolding or dirt for placing blocks in the air.

Compared with nearby sizes

A small change in diameter changes the cost a lot, because the shell grows with the square of the width. Here is the 51 block sphere next to its neighbours in this guide.

Diameter	Hollow	Solid	Chests for hollow
41	4,242	36,137	3
51 (this page)	6,642	69,599	4
64	10,464	137,376	7

Chests are single chests with 27 slots, full of stacks of 64. The hollow 51 block sphere fills 4 of them. A solid one fills 41. If that is more than you want to gather, drop to a smaller diameter or keep the sphere hollow and use the thin shell.

Other sphere sizes

For ellipsoids or sizes not listed, use the sphere generator. For half a sphere, see the dome generator, and use the stack calculator to plan chests.

Height limit information is from the Minecraft Wiki, checked on 25 October 2026. BlockShapes is not affiliated with Mojang or Microsoft.

Frequently asked questions

How many blocks is a 51 block sphere?

A solid sphere needs 69,599 blocks, which is 1087 stacks + 31. A hollow one with a thin shell needs 6,642 (103 stacks + 50), and a thick hollow shell needs 11,642.

How many layers does a 51 block sphere have?

51 layers, one for each block of height. The widest layer is the equator with 2,053 blocks when solid.

Is a hollow 51 block sphere closed?

Yes. The thin shell keeps every block that touches empty space on a face, so it has no holes you could walk through. Corners may touch only at their edges, so choose the thick shell if you need a shell with no diagonal gaps.

Does 51 blocks fit under the build limit?

Yes. The Overworld in Java Edition 1.18 and later is 384 blocks tall, so a sphere of 51 blocks uses 13 per cent of the height.

Which is better, 41 or 51?

A sphere of 41 needs 4,242 blocks hollow, 2,400 fewer than 51. A sphere of 64 needs 10,464 blocks hollow, 3,822 more. Choose by the space you have and the material you can gather.