Cubic Volume Calculator
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Box volume = length × width × height — switch US (inches) or metric (centimeters) for cubic inches, feet, or cm.
Box dimensions
Volume
1,728 in³
1 ft³ · 28,317 cm³
- Cubic feet
- 1
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Calculating box volume
Cubic volume is simply length × width × height, and it is the foundation for dimensional weight, freight density, and carton fill calculations. In US mode, enter dimensions in inches to get cubic inches and cubic feet (divide cubic inches by 1,728). In metric mode, enter centimeters to get cubic centimeters.
Freight quotes, LTL carriers, and customs paperwork frequently ask for cubic feet or cubic meters rather than raw dimensions, so converting once here saves recalculating for every downstream shipping tool. Always measure the outer dimensions of the packed box, not the product inside it.
Example: a 12 × 12 × 12 in box has 1,728 cubic inches, which equals exactly 1 cubic foot (1,728 ÷ 1,728) — a convenient reference size. The same box measured in metric would be about 30.5 × 30.5 × 30.5 cm, or roughly 28,317 cubic centimeters.
Common questions
Should I measure the box or the product inside?
Measure the outer dimensions of the packed shipping box, since that is what carriers use for dimensional weight and freight density calculations — not the bare product size.
How do I convert cubic inches to cubic feet?
Divide cubic inches by 1,728 (12³). This calculator does that conversion automatically alongside cubic centimeters for metric comparisons.