A shulker box has 27 slots. With items that stack to 64, that is 27 × 64 = 1,728 items. With stack-16 items it is 432; with non-stackable items, only 27, one per slot.
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Convert items into stacks, shulker boxes and chests, and back
In Minecraft, most items stack in groups of 64, some in 16 (like eggs, snowballs and signs) and others do not stack at all (like tools and armor). Figuring out how many stacks, shulker boxes or chests you need to store a certain quantity is a recurring bit of math, especially for big projects, farms and villager trades. This calculator converts in any direction: enter the amount in items, stacks, shulkers or chests and see every other unit at once. A shulker box and a single chest each have 27 slots; a double chest has 54, so a container's capacity is its slot count times the stack size. It also shows how many inventory slots the quantity takes, a partial stack already claims a whole slot, and suggests a compact breakdown: full shulkers first, then stacks, then the loose items left over.
In Minecraft, the stack size sets how many units fit in a single slot: 64 for most blocks and materials, 16 for items like eggs, snowballs, signs, empty buckets and ender pearls, and 1 for anything that does not stack (tools, armor, potions and filled buckets). A shulker box and a single chest have 27 slots each; a double chest has 54. Multiplying slots by stack size gives you each container's total capacity.
A partial stack takes a whole slot, so the calculator rounds the slot count up: 65 items of a stack-64 material use 2 slots, not 1.01. That is why the 'slots used' figure is rarely a round number, it reflects exactly how many inventory spaces your amount will occupy.
Example 1, 2,000 cobblestone blocks (stack 64): that is 31 full stacks and 16 loose items (31 × 64 = 1,984, with 16 left over), taking 32 slots. In storage terms it fits in 1 shulker box (1,728 items) plus 4 stacks and 16 items, with room to spare inside a single 27-slot chest.
Example 2, how much fits in a double chest full of shulker boxes? The double chest has 54 slots, each shulker holds 27 × 64 = 1,728 items, so 54 × 1,728 = 93,312 items of a stack-64 material. This is the bulk-storage standard on servers and bases: a single double chest of shulkers holds nearly a hundred thousand blocks.
Shulker boxes are the most efficient way to move large quantities: they keep their contents when broken, so you carry up to 1,728 items of a stack-64 material in a single inventory slot. For base moves and Nether runs, work out how many shulkers your haul needs before you set off.
Stack sizes apply in both Java and Bedrock, and most items follow the 64/16/1 pattern. Special cases like the bundle store the equivalent of one stack spread across different items and do not follow this count, for those, work in item counts directly.
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title="Minecraft Stack Calculator"
></iframe>These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
A shulker box has 27 slots. With items that stack to 64, that is 27 × 64 = 1,728 items. With stack-16 items it is 432; with non-stackable items, only 27, one per slot.
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