Figuring internal volume,Sonotube

[mace]

Hello all, pardon my stupid question

My tube is 16.5od, 23" high and .25" thick. My best calculation comes to around 2.6f^3. Is this close?? Is there a formula?? Thanks in advance-Mace

 

[mpmarino]

Pi x R^2 x H = V

 

[simon5]

Yes you are close. About 2.617 cu.ft

Did you remove the thickness of the baffles you used in the height measurement?

 

[mace]

Thanks guys, and yes Simon,I subtracted 2" for my endcaps. Thanks again.