# How many stacks of items is that?

Turns an item count into Minecraft stacks of 64 or 16 with the items left over, and the inventory slots, chests, double chests and shulker boxes they fill.

- Page: https://www.acalculator.org/game/minecraft-stack-calculator
- JSON spec: https://www.acalculator.org/game/minecraft-stack-calculator.json
- Version: 1bfdce0ce3a4

## Default answer

Example with the default inputs (Items 1,000, Stack size 64): 1,000 items is 15 stacks + 40.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| n | Items | How many items you have or need. |
| s | Stack size | How many of the item fit in one slot: 64 for most blocks, 16 for items such as ender pearls. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| summary | Stacks | Whole stacks plus the items left over, for example 15 stacks + 40. |
| stacks | Whole stacks | ⌊items ÷ stack size⌋. |
| rest | Items left over | Items − whole stacks × stack size. |
| slots | Slots needed | ⌈items ÷ stack size⌉. |
| decimal | Stacks as a decimal | Items ÷ stack size. |
| shulkers | Shulker boxes or chests | ⌈slots ÷ 27⌉: a shulker box or a single chest holds 27 slots. |
| doubles | Double chests | ⌈slots ÷ 54⌉: a large chest holds 54 slots. |

## Method

stacks = ⌊items ÷ size⌋; left over = items − stacks × size; slots = ⌈items ÷ size⌉; shulker boxes = ⌈slots ÷ 27⌉; double chests = ⌈slots ÷ 54⌉.

## Assumptions

- Every slot is filled to the full stack size before the next is used.
- A chest and a shulker box hold 27 slots; a double chest 54.

## Worked examples

1. n = 1,000, s = 64 gives summary = 15 stacks + 40, stacks = 15, rest = 40, slots = 16, decimal = 15.625, shulkers = 1, doubles = 1. Source: Minecraft Wiki, Item: most items stack to 64, some (ender pearls, snowballs, eggs, signs, buckets of snow) to 16, and tools, armor and potions do not stack, https://minecraft.wiki/w/Item (retrieved 2026-10-05); Minecraft Wiki, Chest (27 slots; a large chest 54) and Shulker Box (27 slots), https://minecraft.wiki/w/Chest and https://minecraft.wiki/w/Shulker_Box (retrieved 2026-10-05).
2. n = 1,728, s = 64 gives summary = 27 stacks, stacks = 27, rest = 0, slots = 27, shulkers = 1, doubles = 1. Source: Minecraft Wiki, Chest (27 slots; a large chest 54) and Shulker Box (27 slots), https://minecraft.wiki/w/Chest and https://minecraft.wiki/w/Shulker_Box (retrieved 2026-10-05).
3. n = 100, s = 16 gives summary = 6 stacks + 4, slots = 7, shulkers = 1. Source: Minecraft Wiki, Item: most items stack to 64, some (ender pearls, snowballs, eggs, signs, buckets of snow) to 16, and tools, armor and potions do not stack, https://minecraft.wiki/w/Item (retrieved 2026-10-05).
4. n = 100,000, s = 64 gives summary = 1,562 stacks + 32, slots = 1,563, shulkers = 58, doubles = 29. Source: Minecraft Wiki, Chest (27 slots; a large chest 54) and Shulker Box (27 slots), https://minecraft.wiki/w/Chest and https://minecraft.wiki/w/Shulker_Box (retrieved 2026-10-05).

## FAQ

### How many items are in a stack in Minecraft?

Most blocks and items stack to 64. Some, such as ender pearls, snowballs, eggs and signs, stack to 16. Tools, armor and potions do not stack.

### How many stacks is 1,000 items?

1,000 ÷ 64 = 15.625: 15 full stacks (960 items) and 40 left over, so 16 slots.

### How many items fit in a shulker box?

A shulker box has 27 slots, so 27 × 64 = 1,728 items that stack to 64, or 27 × 16 = 432 that stack to 16.

### How many items fit in a double chest?

A double (large) chest has 54 slots: 54 × 64 = 3,456 items that stack to 64.

### How do I count stacks from items by hand?

Divide by the stack size and keep the whole part for full stacks; the remainder is the items left over. Round the division up for the slots used.

## Sources

- Minecraft Wiki, Item: stack sizes of 64, 16 and 1. https://minecraft.wiki/w/Item (retrieved 2026-10-05)
- Minecraft Wiki, Chest: 27 slots, a large chest 54. https://minecraft.wiki/w/Chest (retrieved 2026-10-05)
- Minecraft Wiki, Shulker Box: 27 slots. https://minecraft.wiki/w/Shulker_Box (retrieved 2026-10-05)