Enclosure Volume Calculator

The Enclosure Volume Calculator quickly computes the internal volume of speaker boxes, subwoofer enclosures, and other housing units. It works for both rectangular and cylindrical enclosures. You can use the result to match audio specs, determine required space, or convert units for design or shipping needs.

You will find this tool useful in the Acoustics and Design Calculators category.

Formula of Enclosure Volume Calculator

1. Rectangular Enclosure Volume Formula:

Volume = Length × Width × Height

• Length is the internal length of the enclosure.
• Width is the internal width.
• Height is the internal height.
• Use the same unit for all dimensions (inches, feet, or centimeters).
• Result is in cubic units (e.g., in³, ft³, cm³).

2. Cylinder Enclosure Volume Formula:

Volume = π × Radius² × Height

• Radius = Diameter ÷ 2
• Height is the cylinder’s internal vertical dimension
• π ≈ 3.1416
• Result is also in cubic units

3. Conversion Formulas:

These conversions help when you want to work across metric and imperial systems.

Quick Reference Table

Here’s a simple lookup table for enclosure volume in common sizes (all rectangular in inches):

This table lets you estimate quickly without manual calculation.

Example of Enclosure Volume Calculator

Let’s say your enclosure is 18 inches long, 12 inches wide, and 12 inches high.

Apply the rectangular formula:
Volume = 18 × 12 × 12 = 2,592 in³

Convert to cubic feet:
2,592 ÷ 1,728 = 1.5 ft³

So, your enclosure holds 1.5 cubic feet of internal volume.

Most Common FAQs