Box Size and Packing Calculator

Enter item size, quantity, and protective padding to estimate a suitable inner box size or the capacity of an existing box.

Report

Item settings

Unit Item length Item width Item height Quantity Allow item rotation

Box settings

Preset scenario Inner length Inner width Inner height

Padding settings

Side padding Top/bottom padding Between items

Result summary

Recommendation or capacity-

Total capacity-

Space utilization-

Remaining space-

Choose a direction

Decide whether you want a suggested box size or the capacity of a box you already have.

Enter size and padding

Fill in item, box, protective spacing, and unit settings. Enable rotation when it is acceptable.

Compare the result

Review suggested size, items per layer, layers, utilization, and remaining space.

When should I use this tool?

Use it before shipping online orders, packing handmade goods, moving, storing items, or buying cartons.

Can it handle multiple item sizes at once?

No. It focuses on one repeated item size and does not perform complex mixed 3D bin packing.

Why should I add padding?

Padding reserves room for protective material and avoids estimates that are too tight to pack in practice.

Can I use the result directly as a carrier size?

Check outer carton size, dimensional weight, and carrier limits separately. This tool estimates inner usable space.

Is my data uploaded?

No. All calculations run locally in your browser and no login or server storage is required.

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