How Many Items Fit in a Box

Calculate how many identical items can be packed into a box

Units
Box

Select a box or enter custom dimensions

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Item Dimensions

Enter the dimensions of the item you want to pack

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Results

Enter box and item dimensions, then click Calculate to see results.

Frequently Asked Questions

Our calculator uses the EB-AFIT algorithm, a sophisticated 3D bin packing algorithm developed at the Air Force Institute of Technology. It tests multiple orientations and packing strategies to find the maximum number of items that can fit in your box while respecting physical constraints.

Yes! You can either select from our preset shipping boxes (UPS, FedEx, USPS, DHL, and more) or enter your own custom box dimensions. Simply clear the preset selection to enter custom measurements.

The calculator shows theoretical maximum capacity without packing material. For real-world shipping, we recommend reducing box dimensions by 1-2 inches (2-5 cm) on each side to account for bubble wrap, packing peanuts, or other protective materials.

Space utilization shows what percentage of the box volume is occupied by your items. Higher utilization means more efficient packing. For rectangular items, you can typically achieve 60-85% utilization. Some empty space is normal due to geometric constraints.

Yes, the algorithm automatically tests all 6 possible orientations for each item to find the optimal packing arrangement. The 3D visualization shows exactly how each item should be positioned.