The radius of the pipe is 0.5 feet.
The area of the cross-section is
pi * r^2
= pi/4 feet^2
The volume is
cross-section * length
= (pi/4 foot^2) * 1 foot
= pi/4 foot^3
There are roughly 7.481 gallons/cubic foot, so the pipe contains
(7.481 gallons/(foot^3)) * (pi/4 foot^3)
= 7.481 * pi / 4 gallons
= 5.875 gallons (not exact)
A four-foot diameter pipe that is five feet long has a volume of 470 gallons.
For a 3 foot diameter pipe, 52.9 US gallons per foot of length.
One foot of 3 inch pipe will hold approximately 0.625 gallons of water.
Pipe is generally cylindrical and the dimension refers to the inside diameter. One cubic foot contains 7.48 gallons. The volume of a one foot long 20" diameter pipe is: pi(1.667/2)^2 = 2.18 cubic feet. At 7.48 gallons per cubic foot the total volume is 16.3 gallons.
If the pipe is round, with a 55-foot diameter, and 36 inches long, then its capacity is 53,317.3 gallons. If the pipe is round, with a 36-inch diameter, and 55 feet long, then its capacity is 2,908.2 gallons. Either way, we have no way of knowing how much water is in it. For all we know, it may even be empty.
In a pipe with diameter 8 ft, there will be just over 376 US gallons per foot.
A 2 ft wide pipe, 1 foot long, will contain 23.5 gallons (US).A 2 ft wide pipe, 1 foot long, will contain 23.5 gallons (US).A 2 ft wide pipe, 1 foot long, will contain 23.5 gallons (US).A 2 ft wide pipe, 1 foot long, will contain 23.5 gallons (US).
Approx 10.3 US gallons.
To calculate the volume of water in a pipe, first convert the diameter to feet (28 inches = 2.33 feet). Then use the formula for the volume of a cylinder (V = πr^2h) where r = radius (half the diameter) and h = height. For a 2.33-foot diameter pipe and 1 foot height, the volume is roughly 17.19 gallons of water per foot.
0.61 * d2 Where d is the diameter of the pipe in inches.
A 12 inch diameter round pipe will hold 4.89 UK gallons or 5.88 US gallons per foot.
Completely filled, (pi x radius squared x length in inches)/231 cu in per gallon = gallons = 13.06122449, if the inside diameter of the pipe is 2 inches. =========== Of course that assumes that the inside diameter is exactly 2 inches. For real pipes, the actual inside diameter of a pipe depends on the "schedule" of the pipe. For a "nominal" pipe diameter of 2 inches, the outside diameter will be 2.375 inches and the wall thickness could vary from .065 inches (schedule 5) to .343 inches (schedule 160) meaning that the actual inside diameter could vary from 2.245 inches to 1.689 inches.