Choose the full width
Measure the outside width of the semicircle. Odd widths use one center column; even widths use a two-block center line.
Semicircle blueprint tool
Minecraft half circle generator for arches and domes.
Start with a half circle pattern, adjust the diameter, preview the block grid, and download a PNG blueprint for arches, roofs, bridges, and curved walls.
Blocks
72
Size
31 x 31
Center
15 / 15
Stacks (64)
1 + 8
Circumference
97.4
Copy rows from the center
Mark the middle, place the top row, and mirror every run of blocks so the left and right sides stay symmetrical.
Export and build
Keep the grid visible or download the PNG, then check each row before extending the curve into a wall, roof, or landscape.
Circle guide
How to build a half circle in Minecraft
A Minecraft half circle is the top half of a pixel circle. Pick the full diameter first, then build only the upper rows shown in the blueprint.
Best uses for half circles
Half circles work well for arches, bridge supports, domed roofs, tunnel mouths, windows, gates, and organic terrain outlines.
Perfect circle source
The semicircle is generated from the same full-circle math, so the curve matches a perfect Minecraft circle pattern.
Choose the right diameter
Odd diameters give a clear center column. Even diameters are useful when the arch needs a two-block middle span.
Switch to full circles
Use the main circle generator when the build needs a complete tower, arena, floor, portal ring, or circular base.
Continue planning the build
Related Minecraft building tools
Move from the current blueprint to the next structural detail without starting the measurements again.
Built for Minecraft players
Fast planning for survival bases, megabuilds, and pixel art.
Instant preview
Every input updates the blueprint immediately, so you can test sizes before committing resources.
Survival-friendly counts
The block counter helps you estimate materials before a long mining or gathering session.
PNG export
Save the exact grid with the current material color and optional grid lines.
Free forever
MCCircle does not require accounts or subscriptions. Future monetization is planned through lightweight ads.
Minecraft half circle generator FAQ
What is a Minecraft half circle?
It is one half of a pixel-perfect circle pattern. The chart keeps the curve symmetrical while showing only the rows needed for a semicircle.
How do I choose the half circle width?
Use the full outside width of the curve. Odd widths have one center column, while even widths have a two-block center line.
Can I make a filled semicircle?
Yes. Turn on Filled to create a solid half-disc for terrain, floors, or decorative panels; leave it off for outlines and structural curves.
Is a half circle the same as an arch?
The geometry can be the same, but the workflow is different. This page is for general semicircle charts; the Arch Generator adds doorway, gate, bridge, and tunnel presets.