Minecraft Stack Calculator
Enter the total number of items and choose the stack size for that item type. The calculator converts your count into full stacks, leftover items, and every major storage container in Minecraft: single chest, double chest, shulker box, ender chest, and a double chest packed with shulker boxes. Switch between mode 1 (items to stacks) and mode 2 (stacks to items) using the direction toggle.
How Minecraft stacking works
Every item in Minecraft has a maximum stack size that determines how many copies fit in one inventory slot. The vast majority of blocks and items stack to 64, making a full stack the standard unit of measurement in the game. Some throwable items, including ender pearls, snowballs, and eggs, are capped at 16 per slot because they were designed to be thrown one at a time. Tools, armour, bows, crossbows, potions, and a handful of other items are unstackable: each occupies an entire slot on its own. Knowing the stack size of an item is essential before doing any storage math, which is why this calculator lets you choose between standard (64), small (16), unstackable (1), or a custom value.
Container capacities at a glance
A single chest holds 27 slots, and a double chest holds 54 slots. A shulker box also holds 27 slots, but its crucial advantage is portability: a shulker box is itself an item that fits in a slot, so a double chest full of shulker boxes effectively stores 54 x 27 = 1,458 stacks. At a stack size of 64 that is 93,312 items in the footprint of a double chest, compared to just 3,456 from a standard double chest. An ender chest is private to each player, holds 27 slots, and never drops its contents on death. The player inventory has 36 usable slots (the 4 armour slots and the offhand slot are counted separately and are not included here).
Items-to-stacks formula
The core formula is: full stacks = floor(total items / stack size) and leftover items = total items mod stack size. For example, 1,728 cobblestone divided by 64 gives exactly 27 full stacks with 0 leftover, which is precisely one full single chest. The total number of inventory slots you need is always the number of full stacks plus one extra slot if there are any leftover items. The reverse direction is equally simple: total items = full stacks x stack size + extra items.
Practical storage planning tips
When planning a large farm or bulk-storage system, work in double chest multiples. A double chest holds 54 stacks of standard items, equal to 3,456 items. If you are sorting 64-item stackable items, a single shulker box holds 27 stacks (1,728 items), and you can carry 36 shulker boxes in your full inventory (roughly 62,208 items on your person). For the highest density, fill shulker boxes and then store those inside a double chest. For items that only stack to 16, multiply slot requirements by four compared to standard items when sizing your storage room.
Common Minecraft item stack sizes
| Item category | Example items | Stack size | Slots per double chest |
|---|---|---|---|
| Standard blocks and items | Cobblestone, wheat, sand, glass | 64 | 3,456 |
| Small stackable items | Ender pearls, snowballs, eggs, buckets | 16 | 864 |
| Tools and weapons | Pickaxes, swords, shovels, axes | 1 (unstackable) | 54 |
| Armour | Helmets, chestplates, leggings, boots | 1 (unstackable) | 54 |
| Bows and crossbows | Bow, crossbow, fishing rod, shears | 1 (unstackable) | 54 |
| Potions and bottles | Water bottle, splash potion | 1 (unstackable) | 54 |
| Banners | All colour banners | 16 | 864 |
| Written books | Written book, knowledge book | 1 (unstackable) | 54 |
| Cake | Cake | 1 (unstackable) | 54 |
Default stack limits as of Java Edition 1.20 and Bedrock Edition. Always check your version for modded or updated items.
Frequently asked questions
How many items are in a full stack?
Most items stack to 64. Some items (ender pearls, snowballs, eggs, buckets) are capped at 16. Tools, weapons, and armour are unstackable, so each piece occupies one slot on its own.
How many stacks fit in a single chest?
A single chest has 27 slots. At a standard stack size of 64, that is 27 x 64 = 1,728 items. At a small stack size of 16, it is 27 x 16 = 432 items.
How many stacks fit in a double chest?
A double chest has 54 slots. Filled with standard 64-item stacks, that is 3,456 items. With 16-item stacks the capacity is 864 items.
How many items can a shulker box hold?
A shulker box has 27 slots, the same as a single chest. Filled with standard stacks, a shulker box holds 1,728 items. Because the shulker box itself is a portable item, you can carry one in each of your 36 inventory slots for a total of about 62,208 items on your person.
What is a "double chest of shulker boxes" and how many items does it hold?
A double chest of shulker boxes means a double chest (54 slots) where every slot contains one shulker box. Each shulker box holds 27 slots x 64 items = 1,728 items, so the whole setup holds 54 x 1,728 = 93,312 items of a 64-stackable item in the footprint of one double chest.
Why does my item only stack to 16?
Certain items are intentionally limited to 16 per slot in Minecraft's game data. The most common are ender pearls, snowballs, eggs, and empty buckets. This is a design decision tied to how those items are used, generally as throwables or tools, so they are given smaller stacks to make them feel more like resources you spend rather than hoard.
How many stacks are in a full ender chest?
An ender chest has 27 slots, the same as a single chest. It holds 27 stacks (1,728 items at stack size 64) and is unique to each player, meaning its contents are never dropped on death.