📦 Stack Quantity Calculator
Enter a total quantity and a stack size to see how many full stacks you get, plus the leftover amount.
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What this calculator does
Many inventory systems, warehouses, and games group items into fixed-size stacks. This calculator divides a total item count by a stack size so you know how many complete stacks you have and how many items are left over.
How the calculation works
Full stacks equal the total quantity divided by the stack size, rounded down. The leftover amount is the remainder after removing those full stacks. Stacks needed (including a partial one) rounds the division up instead, which is handy for figuring out how many containers or slots to reserve.
Use whole numbers for the clearest result; the calculator rounds fractional leftovers for display.
Last reviewed August 2026