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Calculators / Shipping & logistics / Packaging void volume

Packaging void volume calculator

Subtract occupied product volume from internal carton volume to estimate empty space.

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Your result

Unoccupied volume9,000cm³
Void fraction37.5%
Unoccupied volume in litres9L

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How to calculate

Packaging void volumeMeasure product volume on the same basis as internal box volume. Leave enough protection using the packaging supplier’s guidance. Concept diagram; not to scale.Packaging void volumeInternal boxlength (cm)40Internal boxwidth (cm)30Unoccupiedvolume9000 cm³MyCalCute.com
Measure product volume on the same basis as internal box volume. Leave enough protection using the packaging supplier’s guidance. Concept diagram; not to scale.

Subtract occupied product volume from internal carton volume to estimate empty space.

Unoccupied volume = length*width*height-occupied cm³
Void fraction = (length*width*height-occupied)/(length*width*height)*100 %
Unoccupied volume in litres = (length*width*height-occupied)/1000 L

Worked example

  • Internal box length (cm): 40
  • Internal box width (cm): 30
  • Internal box height (cm): 20
  • Occupied product volume (cm³): 15000
  • Unoccupied volume: 9,000 cm³
  • Void fraction: 37.5 %
  • Unoccupied volume in litres: 9 L

Assumptions and limits

An equal volume does not imply geometric fit or adequate protection. Actual fill material compresses and has a product-specific yield; this is not a material purchase quantity.

Results are rounded for display; calculations use unrounded values. Read our calculation methodology.

Understanding the result

Subtract occupied product volume from internal carton volume to estimate empty space. Measure product volume on the same basis as internal box volume. Leave enough protection using the packaging supplier’s guidance.

When this tool is useful

Measure product volume on the same basis as internal box volume. Leave enough protection using the packaging supplier’s guidance.

Understanding your inputs

InputExample
Internal box length (cm) length40
Internal box width (cm) width30
Internal box height (cm) height20
Occupied product volume (cm³) occupied15000

Frequently asked questions

What assumptions should I check?

An equal volume does not imply geometric fit or adequate protection. Actual fill material compresses and has a product-specific yield; this is not a material purchase quantity.

How can I check the result?

Start with the labelled example. Keep units consistent, calculate without intermediate rounding and change one input at a time. The diagram explains the model; the result table supplies the numerical answer.

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