Void fill calculator
Work out how much empty space needs filling in a box.
How it works
Void fill is anything that stops the product moving: packing peanuts, crumpled paper, air pillows or shredded paper. The amount you need is the box volume minus the product volume.
A high empty-space percentage is a sign the box is too big. Past about 40 to 50%, you're paying for fill and shipping air. Use the box size calculator to find a tighter box, or the right-sizing savings calculator to see what that's worth.
Loose fill settles, so pack it firmly and add a top layer before closing. The box should feel solid when shaken.
Results are estimates based on typical industry values. Confirm final specifications with your supplier or carrier.
Frequently asked questions
How much packing peanuts do I need?
The empty volume of the box. A box with 0.3 cu ft of empty space needs about 0.3 cu ft of peanuts, plus a little extra because they settle.
What is a good amount of empty space in a box?
Under about 30% is efficient. Much more than that usually means a smaller box would do.
Related articles
- How much void fill do I need?
How to calculate how much void fill a box needs, compare peanuts, paper and air pillows, and cut fill by choosing a better box size.
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