Java item stack and slot arithmetic
Minecraft Stack Calculator for Items, Slots, and Shulkers
Pick one official Java 26.2 item and enter a non-negative whole quantity. The browser calculates full default stacks, remainder, occupied slots, and eligible shulker grouping without custom stack sizes, recipes, mixed inventory, or mod rules.
Official default size
There is no manual stack-size override and no component, mod, plugin, or custom-server rule.
- Quantities must remain non-negative safe integers so every quotient and remainder is exact.
- Recipes, recursive materials, current inventory subtraction, and build estimates belong to other tools.
Grouping, not inventory design
Shulker metrics group occupied slots only. Chests, bundles, backpacks, mixed items, and nesting are outside the model.
Count one Java item
Choose one generated Java 26.2 item and enter a non-negative quantity to calculate its official default stacks, remainder, occupied inventory slots, and eligible shulker-box grouping locally.
Loading Java 26.2 item data…
The selected item supplies its frozen default maximum stack size of 1, 16, or 64.
Enter a whole number from 0 to JavaScript's safe-integer maximum.
Item IDs and default stack sizes come from the frozen Java 26.2 generated asset.
Technical IDs remain in canonical minecraft:namespace form.
Stack and slot result
Every metric uses this item's default Java 26.2 stack size.
Every metric uses this item's default Java 26.2 stack size.
Default stack arithmetic only
This page divides one quantity by the selected item's frozen default stack size.
- Official default size
- There is no manual stack-size override and no component, mod, plugin, or custom-server rule.
- Grouping, not inventory design
- Shulker metrics group occupied slots only. Chests, bundles, backpacks, mixed items, and nesting are outside the model.
Quantities must remain non-negative safe integers so every quotient and remainder is exact.
Recipes, recursive materials, current inventory subtraction, and build estimates belong to other tools.
Item search and arithmetic run in this browser and are not saved to an account.