COOKIE TOOLS · BUILDING

Minecraft Building Materials Calculator

Create a mixed-material shopping list. Calculate stacks, leftovers and occupied slots per item, then copy the list or import and export a CSV manifest.

FreeNo sign-upBrowser-basedJava 1.21.11 data

Your result

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Copy-ready output

How to use

Add or duplicate an item row and enter a whole quantity.
Use native stack sizes or an explicitly custom size. Import CSV with item_id,quantity columns.

Examples

65 stone + 15 ender pearls

3 occupied slots (2 + 1)

27 diamond swords

27 occupied slots; 1 single chest

Supported versions & limitations

Verified Java dataset: 1.21.11

Different items cannot share a slot. Duplicate identical IDs are merged before packing.
Container nesting is not modeled; shulker boxes themselves cannot be put into another shulker.

Frequently asked questions

Why not divide all items by 64?

Mixed items have separate stacks and some items stack to 16 or 1.

Is my list uploaded?

No. CSV processing stays in your browser. Draft export is optional and local.

Sources

https://piston-meta.mojang.com/mc/game/version_manifest_v2.json

Facts reviewed 2026-10-12. Supported scope and preview limitations are described above.