BUILDING / MATERIALS

Minecraft building blocks and material calculator

Calculate blocks needed for Minecraft walls, floors and solid rectangular shapes including window and door openings.

Wall, floor and solid volumeBlocks, stacks and shulker boxesSubtract basic door and window openings

Use the calculator

All calculations run locally in your browser. Invalid input does not produce a fake result.

Length (blocks)Width (blocks)Height (blocks)Structure2-block-high door openings1-block window openings

Required blocks464

Full stacks (64)7

Extra blocks16

Shulker boxes if all 64-stackable1

Model assumes 1-block-thick walls, no roof or floor in walls mode; a door opening removes 2 blocks, a window removes 1. Openings must not overlap. Actual supports, stairs, decoration and overhangs are not counted.

How it works, step by step

For a room with one-block-thick walls, count the perimeter and multiply by the wall height. The result excludes its floor and roof.
A floor is one layer across the full rectangle. Solid mode counts every block in the rectangular prism. Doorway slots and window openings are subtracted only in the walls mode.
A build with multiple floors, stairs, thick walls, special blocks or roofs needs a separate count. Allow spare materials so you do not run short halfway through construction.

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