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CraftShape

Minecraft Bridge Arc Generator

The side profile of an arched bridge, row by row, plus the deck plan and separate block counts for the arch and the walkway.

Bridge Arc Generator — 41 x 13 blocks

Controls

Crossing

Crossing

blocks

Bank to bank, measured along the bridge.

blocks

A fifth to a third of the span looks best.

blocks

Height of the walkway above the arch springing point.

Structure

Structure

blocks
blocks

Bridge side profile

41 x 13 blocks · 815 blocks

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

Deck plan (top down)

Building this with friends?

Launch a private Minecraft server, invite your team, and bring this blueprint to life together.

Read our plain-English guide first — no offer attached.

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Build summary

Span
41 blocks
Rise
10 blocks
Width
5 blocks
Blocks per slice
122
Arch blocks
610
Deck blocks
205
Build one slice of the profile, repeat it for the full width, then lay the flat deck on top.

Row-by-row instructions

  1. Row 1:place 41 blocks
  2. Row 2:place 2 blocks, leave 37 spaces, place 2 blocks
  3. Row 3:place 2 blocks, leave 37 spaces, place 2 blocks
  4. Row 4:place 2 blocks, leave 14 spaces, place 9 blocks, leave 14 spaces, place 2 blocks
  5. Row 5:place 2 blocks, leave 11 spaces, place 15 blocks, leave 11 spaces, place 2 blocks
  6. Row 6:place 2 blocks, leave 8 spaces, place 6 blocks, leave 9 spaces, place 6 blocks, leave 8 spaces, place 2 blocks
  7. Row 7:place 2 blocks, leave 6 spaces, place 5 blocks, leave 15 spaces, place 5 blocks, leave 6 spaces, place 2 blocks
  8. Row 8:place 2 blocks, leave 5 spaces, place 3 blocks, leave 21 spaces, place 3 blocks, leave 5 spaces, place 2 blocks
  9. Row 9:place 2 blocks, leave 3 spaces, place 3 blocks, leave 25 spaces, place 3 blocks, leave 3 spaces, place 2 blocks
  10. Row 10:place 2 blocks, leave 2 spaces, place 3 blocks, leave 27 spaces, place 3 blocks, leave 2 spaces, place 2 blocks
  11. Row 11:place 2 blocks, leave 1 space, place 2 blocks, leave 31 spaces, place 2 blocks, leave 1 space, place 2 blocks
  12. Row 12:place 4 blocks, leave 33 spaces, place 4 blocks
  13. Row 13:place 3 blocks, leave 35 spaces, place 3 blocks

How the arch profile is calculated

The arch follows a parabola: at every point along the span the generator works out how high the curve reaches, then keeps the blocks within the arch thickness below that line. Where the curve drops below the deck near the banks, vertical piers fill the gap so the structure carries its own weight visually.

Getting the proportions right

  • Rise ≈ span ÷ 5 — a long, elegant crossing suitable for wide rivers.
  • Rise ≈ span ÷ 3 — a bolder Roman look, good over ravines.
  • Rise > span ÷ 2 — very steep; usually better split into several smaller arches.

Build order

  1. Mark both banks and the centre of the span.
  2. Build one full slice of the profile, working up from both banks towards the crown.
  3. Repeat that slice across the width — every slice is identical.
  4. Lay the deck flat on top, then add kerbs, lanterns and railings.

Frequently asked questions

How do I build an arched bridge in Minecraft?
Build one vertical slice of the arch first, from one bank to the other, then repeat that identical slice across the width of the bridge and lay the deck on top. This generator draws that slice for you, row by row.
How high should the arch rise?
Between a fifth and a third of the span reads well. A rise of more than half the span looks like a hump rather than a bridge and is warned about in the tool.
How wide should a bridge be?
Three blocks for a footpath, five for a road with kerbs, seven or more if you want carts, lanterns and railings without crowding the walkway.
How do I stop the bridge sagging in the middle visually?
Keep the deck perfectly flat and let the arch below it do the work. A deck that follows the arch curve is harder to walk and reads as damaged rather than elegant.
How many blocks does the bridge need?
The summary splits the total into arch blocks and deck blocks so you can bring the right amount of each material. Multiply happens automatically when you change the width.
Can I use this for a viaduct with several arches?
Yes — generate one arch at the span you want, then repeat it with a pier between each. Keep the span and rise identical so every arch matches.

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