Minecraft Stack & Inventory Calculator
Turn item counts into stacks, chests and shulker boxes
Free Minecraft stack calculator. Convert items to stacks and back, find the remainder, and see how many chests, double chests, shulker boxes or inventories you need — built on the canonical stack sizes (64 / 16 / 1).
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The stack calculator works out how much room your items will take up in Minecraft.
Items sit in the inventory in piles, and a pile is not endless: most blocks gather in sixty-fours, ender pearls, snowballs and buckets only in sixteens, while tools, armour and potions do not stack at all — one per slot. That is why "how many chests do I need" cannot be guessed.
The calculator works in three directions: items into stacks with a remainder, stacks back into items, and the capacity of a chosen container. All the containers are there: the player inventory at thirty-six slots, a chest and a barrel at twenty-seven, a double chest at fifty-four, a hopper at five.
There is also a switch that fills every slot with a shulker box. One shulker box holds twenty-seven stacks, and a double chest packed with shulker boxes stores items to the number of ninety-three thousand three hundred twelve. Putting a shulker box inside another one is not allowed. Stack sizes and slot counts are the same in both editions, so the result fits either one.