Spiral staircase

One step at a time. All the way up. Java & Bedrock

Check your staircase. The last valid staircase stays visible.

Diameter

Staircase settings

Diameter3–41 blocks

Quick sizes

Heightblocks to climb

Common heights

Steps

Direction going up

Step width

Steps per turn

Headroom 7 blocks · 2 turns

Fewer steps per turn make a steeper staircase. Auto gives each inner block its own step.

Tower

The wall includes a two-block doorway beside the first step.

Step material

Scene companions 3D only

The character is life size: use it to check the headroom.

Plan display

Numbers appear in the 2D plan. Layer images show an arrow pointing up each stair.

Project name optional

Layer

Preparing your blocks…

Loading viewer…

Layer highlighted

Character of the day1.8 blocks · life size

Build your staircase, layer by layer

3D: drag to rotate, scroll or pinch to zoom. In Explore mode, click a block to jump to its layer.

Layer plan: the exact blocks for the selected Y level. The gold band in 3D shows this layer.

Progress: mark individual blocks or a whole layer. Green means built. Undo restores the previous state.

Keyboard: focus the plan. Page Up / Down changes layers; arrows select a cell and Enter marks it. R resets the camera.

Select a layer to start buildingBuilt

Total blocks310

This layer31

Placed0

Remaining310

Climb: 16 blocks · 16 stairsHeadroom: 7 blocksDoorway: Collect: · 3–41 blocks across

What to collect

Every block in the plan, including the wall and column.

Plan the crafting

Layer-by-layer block counts

Build from the bottom up: layer 1 is Y 0. Click a layer to select it.

How to build a Minecraft spiral staircase

Choose the size and the climb

The diameter is the outside width of the tower, from 3 to 41 blocks. Height is how many blocks the staircase climbs. A 3-block staircase winds around a single column; wider towers give wider steps and an optional open well in the middle.

Steps per turn sets how steep the staircase is. Players need two free blocks above every step, so a turn needs at least 3 stairs, or 5 slabs. Auto gives every block next to the centre its own step, which keeps the climb gentle. The headroom shown is the space between a step and the step directly above it.

Stairs, slabs or blocks

Stairs rise one block per step and face the way up, so you can walk without jumping. Slabs alternate between bottom and top halves and rise half a block per step. Full blocks rise one block per step and need a jump each time.

Build it layer by layer

Start with layer 1 at Y 0 and work upwards. The layer plan shows the wall, the column and the steps for that height; downloaded layer images add an arrow pointing up each stair. Mark blocks as you place them and save the project to keep your progress on this device.

Take the plan into Minecraft

The Java 1.21.5 .mcfunction export places every stair with its facing and every slab in the right half, relative to where you run it. CSV exports list X, Y, Z and the exact block. What to collect counts every block, and Plan the crafting opens the materials in the Resource calculator.