Calculation
Formula and game rule
Full stacks = floor(item count ÷ stack size). Leftovers = item count modulo stack size. Add one slot when leftovers are greater than zero.
Inventory
Stack Calculator
Convert item counts into full stacks, leftovers and occupied slots.
Stack CalculatorTry it now
Your Minecraft mission
- Full stacks
- 15
- Leftovers
- 40
- Slots used
- 16
Game rule: Results update instantly while you type.
Step-by-step guide
How to use the Stack Calculator
Enter the total number of items you want to store or move.
Set the correct maximum stack size for that item: normally 64, 16 or 1.
Read the full stacks, loose items and occupied inventory slots.
Worked example
Example result
1,000 cobblestone at 64 per stack becomes 15 full stacks plus 40 blocks, occupying 16 slots.
What to check before using the result
- Non-stackable items such as most tools use a stack size of 1.
- Some items, including ender pearls and snowballs, use a stack size of 16.
Java and Bedrock Edition
The arithmetic is identical in Java and Bedrock Edition, but confirm the selected item's stack size in the version you play.
This page is designed for players looking for a Minecraft stack calculator, items to stacks, inventory slot calculator. The calculator runs locally in your browser and updates without sending your world coordinates or command inputs to the server.
Common questions
Stack Calculator FAQ
How many slots does a partial stack use?
Any non-empty partial stack occupies one complete inventory slot.
Does this include shulker boxes?
This page counts slots; use the storage calculator to convert those slots into shulker boxes and chests.