Need to know how long the pipe is first.
3 inch (inside diameter) pipe = 0.25 feet. Radius = 0.125 ft Cross section area = pi*(0.125 ft)2 = pi * 0.015625 ft2 . Multiply by 80 ft = pi * 1.25 cubic feet = 3.926990817 cubic feet x 7.480517578 (US gallons / cubic ft) = 29.37592384 US gallons.
A 1-meter length of 102mm inside diameter pipe has a volume of: 1.797 cubic Imperial gallons or 2.159 US gallons.
I'll assume you have Schedule 40 pipe. 2.5 inch has an ID of 2.469 inches, and an area of 4.7878 in^2. The volume of 69" of that (5.75 ft) is 330.4 in^3. One gallon is 231 in^3, so it will contain 1.430 gallons if full.
The inside diameter (ID) is 8 inches. The nominal pipe size (NPS) and outside diameter (OD) depend on the thickness of the walls of the pipe.
Assuming you're talking inner diameter (ID) of the pipe some basic math will answer this question. Volume of a cylinder = pi * radius^2 * length So for us, pi *.25*.25*12 = 2.35619449 cubic inches = 1.30559695 US fluid ounces. So a better question would be how many oz per foot.
294.12 inches 24.51 feet.
To calculate the capacity of a pipe you need to first calculate the area and volume. So assuming your pipe has an inside dimension (ID) of 3 inches, you would use the following equation. πR2 = area πR2xH = volume π=3.1416 Using inches as our unit R (radius) = half the diameter = 1.5 inches H (height or length of pipe) = one foot of pipe = 12 inches Gives you the volume in cubic inches 1728 cubic inches per cubic foot (12x12x12) One cubic foot = 7.48 US gallons (RxR)x3.1416x12 (1.5x1.5)x3.1416x12 = 84.82 cubic inches 84.82/1728=.049 cubic feet .049 cubic feet x 7.48 US gallons per cubic foot = 0.36652 US gallons per foot of 3" ID pipe.
A square foot has no volume. if you are asking how many gallons are in a cubic foot the answer id 7.4805195.
radius squared times pie times length = cubic inches1.5 x 1.5 x 12 = 84.78 cubic inchesThere is 231 cubic inches in a gallon, therefore 84.78 divided by 231 = .36 gallonsThe improved answer is as follows: (the solution above omitted Pi (3.1416)), therefore3.1416 x 1.5 x 1.5 x 12 = 84.82 (carrying Pi out to 4 places) divided by 231 = .367 gallons.The answer was correct, but the solution as shown didn't show Pi as part of the equation
Area = diameter x 2" X .7854 2 x 2 x .7854=3.1416 Volumn square inches = Area x Length 3.1416 x 120"=376.99 liquid in gallons = square inches / 231=1.63 gallons There is 231 sq" in a gallon The volume of a right circular cylinder, V, is V=πr2h. The radius, r, is half the diameter, 1 inch or (1/12) foot and the height, h, is 10 feet, so V=π(1/12ft)2(10ft)=π(1/144)ft2(10ft)=0.218ft3. 1ft3=7.481 gal (0.218ft3)(7.481gal/ft3)=1.63 gal
Assuming you are dealing with half inch id tubing it is 13.17 cubic cm per inch.
assuming it's hollow. 10.68*ID*(OD-ID)