Find how many slots and chests you need for all your items.
Slots needed
Per item
Add each item, its quantity and the stack size (e.g. 64 in Minecraft).
Enter how many slots your chest or backpack has (e.g. 27 for a small chest).
See total slots used, full stacks, and how many containers you need.
Items pack into stacks of a fixed size — 64 for most Minecraft items, 16 for some, 999 in many MMOs. Planning storage means dividing quantities by stack size and counting the slots, which gets tedious fast for big farms.
Whether you are designing a Minecraft storage room or an MMO bank, knowing exactly how many chests a farm produces saves trips and avoids wasted space. This calculator does the slot math for any item mix.
At a 64 stack size with 27-slot small chests, 10,000 items need 157 full stacks — about 6 chests. This calculator gives the exact number for your sizes.
It is set by the game: Minecraft uses 64 (16 for some items), most MMOs use 99-999. Enter your game's stack size and container slots to get accurate totals.
Yes — unstackable items take one full slot each. Set the stack size to 1 for those and the calculator handles them correctly.
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