Chart for pipe volume

Bob W._3

I recall a chart for measuring the volume of pipe somewhere on this site, but can't find it this morning. Sometimes I wander off the Wall and just wander away...

Its been a long time since high school math. For 2&1/2" pipe, would it be pi x r squared x 12 (3.1416 x 1.25 x 1.25 x 12) for 58.905 cu. in. per foot, or approx. .03488 cu. ft?

Brian (Tankless)

You got it

I think :O)

Or Pi x D squared over 4 X length. CSA X L