Minecraft Stack Calculator
Convert items into full stacks, leftover items, inventory slots, chests and shulker boxes.
Calculator
Plan your stacks
Result
156 stacks + 16 items
10,000 items at 64 per stack
Storage plan
Based on occupied slotsPlayer inventories
4 full + 13 slots in the last
Single chests
5 full + 22 slots in the last
Double chests
2 full + 49 slots in the last
Shulker boxes
5 full + 22 slots in the last
156 × 64 + 16 = 10,000
How it works
Turn item counts into a usable storage plan
Enter the item count
Use a total quantity from a build list, farm output, trade plan or storage project.
Choose the stack size
Select 64, 16 or 1, or enter a custom value for modded and server-specific items.
Prepare your storage
Use the exact stack, slot, chest and shulker counts to collect and organize materials.
Calculation
Minecraft stack formula
The calculator divides the total number of items by the selected stack size. The whole-number result is the number of complete stacks, while the remainder is the number of items in the final partial stack.
full stacks = floor(items ÷ stack size)
leftovers = items mod stack size
slots = ceil(items ÷ stack size)
FAQ
Common stack and storage questions
How many items are in one Minecraft stack?
Many Minecraft items stack to 64. Some stack to 16, while tools, armor and other non-stackable items use one inventory slot per item. The custom option supports other stack sizes.
How many stacks fit in a shulker box?
A shulker box has 27 slots, so it holds 27 full stacks of one stackable item. At 64 items per stack, that is 1,728 items.
How many stacks fit in a double chest?
A double chest has 54 slots. It holds 54 full stacks, equal to 3,456 items when each stack contains 64.
Why is the occupied slot count higher than the full stack count?
Any leftover item needs an additional slot. For example, 65 items at a stack size of 64 use one full stack and one partial stack, so they occupy two slots.