GetShipMargin
PackagingVerified formula

Void Space Calculator

Estimate how much of a box is not occupied by the product.

Free · no sign-up
Package inputs
Use outside package dimensions. Your result stays on this device unless you choose to save it.

Product dimensions (in)

Box inside dimensions (in)

Live result Deterministic
Shipping intelligence
No AI estimates. Every output comes from the published formula.

Your result will appear here

Enter package data and calculate. No account is required.

How to use this tool

A decision, not just an output

Measure empty volume and void percentage inside a shipping box. Read the output alongside its interpretation, assumptions, limitations, and source. Marketplace rates and external requirements should always be confirmed at the linked official source.

Formula & example

Transparent method

Void percentage = (box volume − product volume) ÷ box volume × 100.

Example: A 500 in³ product in a 1,000 in³ box has 50% void space.

Assumptions

  • • Product bounding-box volume represents occupied space.

Limitations

  • • Irregular shapes and void-fill compression are not modeled.

Frequently asked questions

Is the Void Space Calculator free?

Yes. The primary result is available without creating an account or entering an email address.

How is the result calculated?

Void percentage = (box volume − product volume) ÷ box volume × 100.

What should I verify before using it?

Irregular shapes and void-fill compression are not modeled.

Are my inputs private?

Core inputs are processed in your browser. GetShipMargin Tools records anonymous interaction events, not the business values entered into this form.