Measure empty space
Void fill volume calculator
Compare the usable internal carton volume with the combined rectangular volume of the packed products. The difference is the theoretical void before displacement and compression effects.
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✓ Planning result
Change any value and calculate again for a new result.
01 / Method
How to use this tool
- 1
Enter internal box dimensions.
- 2
Enter the product envelope and quantity in the carton.
- 3
Use the void result as a comparison value, not a fill-material purchase quantity.
02 / Model
Assumptions
- Box and products are rectangular.
- Product envelopes do not overlap.
- Volumes are calculated from nominal dimensions.
03 / Boundaries
Limitations
- Loose fill, paper, and air pillows have different yield and compression.
- Irregular products and inaccessible pockets are not modeled.
04 / Common questions
Frequently asked questions
Is one litre of void equal to one litre of fill material?
Not necessarily. Fill materials have different bulk density, compression, and placement efficiency.
What if product volume exceeds box volume?
The calculator reports an error because the stated pack-out cannot fit by volume alone.