The answer will depend on the length of the pipe.
5,600 cubic inches.
A 100-foot pipe with a 6-inch diameter has a volume of: 19.63 cubic feet.
0.0054542 cubic feet.
The volume of this pipe is 1,113 cubic inches or 0.644 cubic feet.
The volume of a 12 inch x 12 inch pipe is: 1,360 cubic inches
201.1 cubic inches for every inch long the piece of pipe is.
Answering "How many Cubic feet are in a 5.5 inch pipe inside 50 feet long?"
A 14-inch diameter by 20 foot long pipe has a volume of: 21.38 cubic feet.
The volume of this pipe is 261.8 cubic feet.
The pipe's volume is the product of its cross-sectional area and its length. The area of a circle is pi*(radius)^2, so in this case pi*9sq.in. or about 28.3 square inches. Multiply this area by the length of pipe you are using to obtain a volume. A 10 foot length of 6 inch pipe will have 3393 cubic inches of volume or 1.96 cubic feet, or 14.7 US Gallons.
245 cubic feet.
2,181.66 cubic feet.