Small tools for big block builds.

What we build

The goal is simple: turn awkward build math into a clear visual plan. Every core tool works without an account and performs calculations in your browser.

How the calculations work

Shape generators use deterministic block grids: each displayed cell is evaluated against the requested circle, oval or sphere boundary, and material totals are counted from the same generated cells you see on screen. The cylinder tool repeats its generated circular layer for the selected height. The portal tool applies the standard 8:1 horizontal X/Z conversion, while the storage calculator uses the selected stack size with 27-slot shulker boxes and 54-slot double chests.

These are planning approximations for block-based building, not official game calculations. Openings, decorative changes, portal-linking behavior and game-version differences can change the final result.

Privacy by design

Core calculations happen locally in the browser. Where a tool remembers progress, that state is stored on the device rather than in a user account.

Independence

VoxelBuild Lab is not an official Minecraft product. We are not approved by, sponsored by, or associated with Mojang or Microsoft. We do not use official logos, textures or game assets.

Corrections

If you find a calculation issue, outdated assumption or accessibility problem, please contact us with the exact tool, inputs and result you expected.