ok i'm trying to calculate my tube's cubic inches..

r=5in assming that r=1/2D
h=14.3

i took my measure ments like this

h= height fron inside (bottom) back plate to mounting ring(top).
r= half of d
d=width of back plate (not to outter edge, the actual plate)

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"Work like you don't need the money, love like you've never been hurt, and dance like you do when nobody's watching."

 

volume
= PI * r^2 * h
= 3.14 * 25 * 14.3
= 1122.55 in^3
= .650 ft^3

- Mike

 

thank you i
got to 1122.55 in^3
brian crunch and all the math stopped

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"Work like you don't need the money, love like you've never been hurt, and dance like you do when nobody's watching."

 

what i really need to know is how to convert cubic inches into feet. i know this is simple but i have forgotten.

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"Work like you don't need the money, love like you've never been hurt, and dance like you do when nobody's watching."

 

Area = L x W x H
12in in a Foot
12 x 12 x 12 = 1728 cubic inches per cubic foot.

 

1728 / 1122.55 = .64962 cubic feet