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View Full Version : formula to find box size



yo0123yo
05-24-2006, 11:26 PM
if u know the width, height and lenth of a box, how do you find the cu ft and tuning of it, thanks

bjfish11
05-24-2006, 11:27 PM
take the internal length x width x height and divide by 1728 to give you gross volume. Then you need to subtract port displacement. Which is basically the volume of the port.

Trey803
05-24-2006, 11:31 PM
What does dividing by 1728 count for? Ive heard to always do this but why??

bjfish11
05-24-2006, 11:32 PM
thats how many square inches there are in a cubic foot.
12" x12" x12" = 1728 cubic inches

Trey803
05-24-2006, 11:34 PM
ahh stupid me!!

bjfish11
05-24-2006, 11:35 PM
o well, now you know!