Subwoofer Enclosure Calculators
Subwoofer Box Calculators
Fast, accurate box calculators for car audio installs. Built for Aussie audio nuts, DIYers, and pros—no BS, just the numbers you need. All measurements in mm, volumes in litres and cubic feet.
Round Port Length Calculator
Enter port diameter (mm), box volume (litres), and tuning frequency (Hz) to get the port length in mm.
Port Length: —
Slot Port Length Calculator
Enter slot width (mm), height (mm), box volume (litres), and tuning frequency (Hz).
Port Length: —
Box Volume Calculator (Rectangular)
Enter outside dimensions and material thickness (all in mm) to get internal volume.
Internal Volume: —
Box Volume Calculator (Cylinder/Tube)
Enter outside diameter, height, and material thickness (all in mm) to get internal volume.
Internal Volume: —