Minecraft Stack Calculator
Turn a pile of items into stacks. Enter how many items you have and choose the stack size — 64, 16, or 1 — to see full stacks plus the remainder, and how many shulker boxes and double chests it takes.
Example: with Number of items 1000 · Stack size 64 (most items) → Stacks: 15 stacks + 40 items.
- Shulker boxes0.58 shulker boxes (1,728 items each)
- Double chests0.29 double chests (3,456 items each)
Computed by the calculator below using its default values. Change any input to see your own numbers.
Full stacks = items ÷ stack size, with the remainder left over. A shulker box or single chest holds 27 slots; a double chest holds 54 slots.
Stacks, slots, and storage
Minecraft groups items into stacks, and most items stack to 64. Divide your item count by 64 and the whole-number part is full stacks; the leftover is the remainder that only partly fills a slot. Some items break the pattern: ender pearls, signs, snowballs, and buckets cap at 16, and tools, armor, and potions do not stack at all.
Storage is measured in slots, not items. A chest or shulker box has 27 slots, so its capacity in items is 27 times the stack size — 1,728 items of a normal 64-stack good. Knowing that turns a raw item count into the number of containers you actually need to haul it.
Planning a haul
Shulker boxes are the mobile option because they keep their contents when broken, so builders think in shulkers when moving materials. Twenty-seven stacks fit in one, and a shulker itself sits in a single slot, letting you carry a chest's worth in your inventory.
For fixed storage, double chests hold 54 slots — twice a single chest. The tool reports fractional containers so you can see, for example, that a load needs a bit more than half a shulker, and round up to pack it.
How it’s calculated
Full stacks = floor(items ÷ stack size); remainder = items − stacks × stack size. A shulker box and a single chest each have 27 slots, holding 27 × stack size items; a double chest has 54 slots, holding 54 × stack size. Container counts are shown to two decimals so partial containers are visible.
Standard Java and Bedrock inventory sizes. Stack size depends on the item — 64 for most, 16 for some, 1 for unstackable gear — so pick the size that matches what you are counting.
Container capacity at a 64-item stack
| Container | Slots | Items (stack 64) |
|---|---|---|
| Single inventory slot | 1 | 64 |
| Shulker box | 27 | 1,728 |
| Single chest | 27 | 1,728 |
| Double chest | 54 | 3,456 |
Standard Minecraft inventory sizes; item totals assume a full 64-item stack per slot.
Common mistakes
- Using a 64 stack for items that only stack to 16, like ender pearls or signs, which nearly quadruples the real capacity.
- Counting unstackable gear as if it stacked; tools, armor, and potions take one slot each.
- Confusing slots with items — a chest holds 27 slots, which is 1,728 items only at a 64 stack.
- Forgetting the remainder when you need whole stacks, leaving a partly filled slot unaccounted for.
Frequently asked questions
How many items are in a stack in Minecraft?
Most items stack to 64. Some, such as ender pearls, signs, snowballs, and buckets, stack to 16, and tools, armor, and potions do not stack at all.
How do I calculate stacks from an item count?
Divide the item count by the stack size. 1,000 items at 64 per stack is 15 full stacks with 40 left over, since 15 × 64 = 960.
How many items fit in a shulker box?
A shulker box has 27 slots, so it holds 27 stacks — 1,728 items at a 64-item stack, or 432 items for things that stack to 16.
How many items does a double chest hold?
A double chest has 54 slots, so it holds 54 stacks: 3,456 items at a 64-item stack. That is twice a single chest's 27 slots.
Why does the tool show a fraction of a shulker?
So you can see partial containers. A load that needs 0.58 shulker boxes fits in one box with room to spare; round up to know how many containers to bring.