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Port Calculators

Designing a Complete Subwoofer Box?

These port calculators are useful when you already know your box volume, tuning frequency, and required port area. But designing a complete enclosure requires more than calculating port length.

The new DIY Box Builder calculates the enclosure and port together. It accounts for port displacement, subwoofer displacement, net and gross airspace, checks whether the port will physically fit, and creates complete printable building plans.

Design My Subwoofer Box

Only need to calculate a port? Just scroll down and select the type of port you want to use.

What kind of port do you need?