36.83 u.s. gallons of water in 1 ft. of 30" pipe
In a pipe with diameter 8 ft, there will be just over 376 US gallons per foot.
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.
There need not be any water at all in the pipe. The capacity of the pipe is approx 3.4 Imperial gallons.
10.4 gallons.
0.61 * d2 Where d is the diameter of the pipe in inches.
The capacity of one foot of a pipe with an inner diameter of 20 inches is approx 1.36 US gallons. The maximum amount of water is, therefore, 1.36 gallons, but there need not be any water in the pipe.
A 1-foot length of a pipe with an 1-inch internal diameter will hold pi*r2*h cubic inches where r = 0.5, h = 12 So 9.42 cubic inches.
A 5-inch pipe will hold approximately 0.36 gallons of water per linear foot. This calculation is based on the formula for calculating the volume of a cylinder (V = πr^2h), where the radius (r) is half the diameter of the pipe (2.5 inches) and the height (h) is 1 foot.
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.
pi*r^2*h gives the volume of a foot long one inch pipe. Radius is 0.5 inches, height is 1 foot/12 inches. So the volume is 9.42 cubic inches. 9.42 (cubic inches) = 0.0407792208 US gallons
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.
The volume of a cylinder is (pi) x (radius)2 x (length).If a pipe has an inside diameter of 48 inches, then one foot of it has a volume of(pi) x (24)2 x (12) = 21,714.688 cubic inches = 94.003 gallons (rounded)We have no way of knowing how much water may be in it. It may even be empty.
A pipe with a volume of 44.17 cubic inches holds up to: 0.1912 US gallons of water.
One foot of 3 inch pipe will hold approximately 0.625 gallons of water.
36.83 u.s. gallons of water in 1 ft. of 30" pipe
If that is 2 inches of pipe, it would be 146.87 gallons.And, the 2 inches would have to be the inside diameter.