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Calculate the external dimensions of a box from internal dimensions, material thickness, and construction allowances.

Calculate the internal volume of a rectangular box using internal length, width, and height dimensions in centimeters, with the result shown in liters.

Calculate the internal volume of a cylindrical enclosure using diameter, height, wall thickness, and end cap style. The result estimates usable internal volume after subtracting wall thickness and accounting for flat or domed ends.

Calculate the internal volume of a trapezoid speaker enclosure using the box height, top depth, bottom depth, and width. The formula finds the trapezoid side profile area and multiplies it by width, then converts cubic inches to cubic feet.

Calculate the volume of a wedge-shaped box using length, width, front height, and back height. The formula assumes the box height changes linearly from front to back, so volume equals length × width × average height.

Calculate the internal air volume of a rectangular speaker enclosure using internal height, width, depth, panel thickness, and the number of internal braces. The result estimates net internal volume after subtracting wall thickness and a simple brace displacement allowance.

Calculate the required internal box dimension for a subwoofer enclosure based on target net volume, panel thickness, box shape, and selected fixed dimensions. The result estimates the missing outer dimension needed to build the box.