#Box volume calculator how to#
#Box volume calculator free#

The longer the port length, the lower the enclosure tuning. Round up or down to the nearest 1/4”: 2.788″ rounds to 2.75″ in. We just need to find the width of the port.Įxample (cont.): 44.608 in.2 ÷ 16 in. For a rectangular box with known dimensions, we already have a height. To calculate the port area, we need height and width dimensions. If you’re looking for extreme tuning, you may have to manipulate this to come up with a box design that’s physically possible. This figure is a good guideline for most applications. You will need 16 square inches of port area per cubic foot of net volume. 82 = 2.788 ft.3 of net volume CALCULATING PORT AREA Remove the 18% from the gross volume: 100% – 18% = 82% or. Net volume is the figure you’ll need to use when determining box size and tuning. Next you’ll need to subtract this 18% to get your net volume. That 18% no longer contains air to feed your woofer(s). The sub and port take up about 18% of that volume. The total available volume you just calculated is the box’s gross volume. = 5890.625 in.3Ĭonvert the volume from cubic inches to cubic feet: 5890.625 ÷ 1728 = 3.4 ft.3 CALCULATING NET VOLUME x 12.5 in.Ĭalculate internal volume in cubic inches: 14.5 in.

#Box volume calculator how to#

Internal volume in ft3 = (Internal volume in in3) ÷ 1728 EXAMPLE:īelow is an example of how to calculate volume for a box built from ¾” thick material with dimensions of 16″ by 34″ by 14″.įirst, subtract the ¾” wood thickness: Internal dimensions = 14.5 in. Internal volume in cubic inches = (height x width x depth)Ĭonvert the volume from cubic inches to cubic feet: Multiply length, width, and height in inches: Subtract material thickness from the external measurements:

#Box volume calculator free#

You can also use free tools like SketchUp or Fusion360 to create and modify a 3D model of your enclosure. If you’re an artistic sort, sketch out your box and write the dimensions next to where you measured them. HOW TO CALCULATE BOX VOLUMEįirst measure the external length, width, and height in inches, and write them down. If you’re designing a box for a specific space, you can keep changing dimensions and calculating the box volume until you find the ideal box size and shape for your application. You’ll need a tape measure, a pencil and paper, and a calculator. Calculating box volume requires simple math and knowing generally what you want from your system.