Minecraft Arch Generator
Enter the opening width, wall height, thickness and depth to get a front-view block grid, the total blocks and the stacks to gather.
The plan above is the last valid one, dimmed. Fix the input to update it.
- Total blocks
- blocks
- Blocks in the front view
- blocks
- Blocks in the curve
- blocks
- Rise of the curve
- rows
- Total height
- rows
- Stacks to gather
- stacks
- Full stacks of 64
- stacks
- Left over
- blocks
Row readout
How the arch is drawn
The curve is the upper half of a ring. The outer circle has a diameter of the opening width plus twice the thickness, using the same rule as the circle generator. The inner circle has a diameter equal to the opening width and the same centre. The ring is the outer circle minus the inner one, and the arch keeps the rows from the top down to the middle. For an odd outer diameter the middle row is included.
Straight walls continue below the curve: each of the wall rows copies the lowest row of the curve, which gives two piers, one on each side of the opening. The total is the blocks in the front view times the depth.
Example: an opening of 3 with thickness 1 has an outer diameter of 5 and a ring of 3, 2, 2, 2, 3 blocks by row. The upper half is rows 1 to 3, which is 7 blocks. With a wall of 2 each pier row has 2 blocks, so the front view has 7 + 4 = 11 blocks, and at a depth of 2 the total is 22.
Reading the grid
The grid is the front view with the top of the arch at the top. The row readout lists each row’s blocks and columns. The gap in the middle of the lower rows is the opening you walk through.
Most placeable blocks stack to 64, and some items differ (Minecraft Wiki). For a domed roof, see the dome generator; the circle chart lists the circles behind the curve, and the stack calculator converts counts into chests.
Not an official Minecraft product, and not affiliated with Mojang or Microsoft.