Carton Capacity Calculator
Calculate how many items fit inside a carton using a simple axis-aligned grid-packing approximation based on carton and item dimensions.
Carton Internal Dimensions
in
in
in
Item Dimensions
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in
in
Result
Items That Fit
64
4 along length × 4 along width × 4 along height
How to Use the Carton Capacity Calculator
Enter your carton's internal length, width, and height, along with the length, width, and height of a single item you want to pack. The calculator works out how many items fit along each dimension by dividing the carton's size by the item's size and rounding down, then multiplies those three counts together for the total number of items that fit in the carton.
Example
A 24 × 18 × 12 in carton packing 6 × 4 × 3 in items fits 4 items along the length (24 ÷ 6), 4 along the width (18 ÷ 4, rounded down from 4.5), and 4 along the height (12 ÷ 3) — for a total of 4 × 4 × 4 = 64 items.
Common Use Cases
- Estimating how many units of a product fit in a shipping or storage carton.
- Comparing carton sizes to find the option with the least wasted space for a given item.
- Planning how many cartons are needed for a production run or order.
FAQs
- Does this account for rotating items to fit more? No — this uses a simple axis-aligned grid-packing approximation, where every item is assumed to sit in the same orientation. Real-world optimal packing can sometimes fit more items by rotating them or mixing orientations, so treat this result as a solid, conservative estimate rather than the absolute maximum.
- Should I use inside or outside carton dimensions? Always use the carton's internal (inside) dimensions — the outside dimensions include the wall thickness of the cardboard, which would overstate how much usable space is actually available.
- Does this leave room for padding or filler? No — it calculates the maximum items that fit based purely on dimensions. If you need to leave space for padding or filler material, reduce the carton's usable dimensions slightly before entering them.