Speaker Box Calculator

All misc tools

Calculate speaker enclosure volume and dimensions.

Box Dimensions

Material Thickness

cm (e.g. 1.9 for 3/4 MDF)

Height (Ext)

Width (Ext)

Depth (Ext)

Internal Volume

Gross Volume24.85 L0.878 ft³

Air Space24.85 Liters

Note: This is the Gross internal volume of air. To get Net volume for tuning, subtract the volume displaced by the subwoofer driver (usually 2-5L) and any ports/bracing.

About this calculator

Overview

Speaker box calculation determines enclosure volume for optimal sound. Sealed vs ported designs. Based on speaker Thiele-Small parameters. Essential for custom audio builds.

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Pro Tips

Sealed: tighter bass, smaller box.
Ported: louder bass, larger box.
Internal bracing reduces resonance.
Polyfill increases apparent volume.

Fun Facts

"Subwoofer box: 1-2 cubic feet typical."
"Bookshelf speaker: 0.5-1 cubic foot."
"MDF preferred over particle board."
"Qtc = 0.707 for sealed alignment."

Formula: Volume = Length × Width × Height (internal); Port tuning depends on volume