Minecraft Arch Generator (Java & Bedrock)
An arch is half an oval ring, stood up and pushed back a few blocks. A 15-wide, 8-tall arch, 2 blocks thick and 3 deep, takes 132 blocks; with a flat walkway on top it becomes a bridge of 162 blocks.
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Blocks for arches (2 thick, 3 deep)
| Span | Height | Arch | Bridge (with walkway) |
|---|---|---|---|
| 9 | 5 | 66 | 84 |
| 15 | 8 | 132 | 162 |
| 21 | 11 | 192 | 234 |
| 31 | 16 | 282 | 354 |
| 41 | 21 | 372 | 468 |
Counts come from the same generator as the tool above, so they always match the grid.
How to use it
- Set the span (how wide the opening plus legs are) and the height.
- Set the depth: how far the arch goes back, like the width of a bridge or a tunnel.
- Pick the arch thickness, and tick Flat walkway on top for a bridge.
- Build the front face layer by layer from the bottom, then repeat it for each block of depth.
- Download it for WorldEdit or Litematica to paste or trace it in game.
How it works
Each block is placed if its centre falls inside the perfect shape that fits your size exactly. Hollow shapes keep only the blocks within your chosen wall thickness of the outside, so walls never have gaps. Every number on this page is calculated, not typed by hand.
Questions
How do I make an arch look round in Minecraft?
Use an odd span so there's one middle block at the top, make it at least 2 blocks thick, and add stairs or slabs on the inside edge to soften the steps.
How tall should a bridge arch be?
About half its span looks natural. Over water, leave at least 3 blocks of air so boats and players can pass under it.
Does this work for Minecraft Bedrock and Java?
Yes. Blocks are the same size in Java and Bedrock, so the same layout works in both editions and in every version.
Why is the centre a 2×2 square on even sizes?
An even diameter has no single middle block, so the centre falls between four blocks. Use an odd size (like 25) if you want one middle block to build from.
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By PickaxeKit Editorial Team. Updated 2026-11-09.