calculation for finding cubic feet of a box??

[verb1999]

Well as a flat out question, what is the calculation you use to find out the cubic feet of a box? We haven't built it yet, so we need to know how much wood to buy and everything.

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[pw91686 10+ year member]

it is simple math: length x width x height

But these are the internal dimensions, do not include the thickness of the wood in your calculations. And also you have to account for the displacement of your subwoofer, which is usually between .1 and .2 cubic feet which shouldnt make much of a different if you are building a sealed application. But it will make a difference if it is a ported application...

 

[verb1999]

Well, it will be a ported box actually. How should I calculate in the displacement of the subwoofer?

 

[hoss 5,000+ posts]

length x width x heighth in inches

get that number and divide by 1728 to get cubic feet.

or you could just start with your measurements in feet, make sure you translate the inches to decimals though.

 

[CRXBMPN 5,000+ posts]

Well, it will be a ported box actually. How should I calculate in the displacement of the subwoofer?

go to the manf's web site and find the volume taken up by the woofer and subtract it out of the overall net volume of the box ??? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[cdj 10+ year member]

Here are some calculator programs that will do most of the work for you:

http://www.bcae1.com/spboxnew2.htm