You didn't provide enough information to fully answer this question. Volume requires 3 dimensions, and you provided 2 (or didn't fully explain the 3rd). To determine volume, you need length, width and height LxWxH=Volume. I'll explain how to solve this math problem the best way I can. 1 gallon = 231 cubic inches http://www.onlineconversion.com/volume.htm Now that you know there are 231 cubic inches per gallon, determine the volume of water you need in inches. I'm going to guess you were meaning the tube is 12 inches long and either a 4 inch diameter. Volume of a cylinder can be acheived by multipling the area of the base times height. Assuming your cylinder is a perfect circle with an inside diameter of 4 inches, the base would be PI * r2 or 3.141592 * (2*2) or 12.535668 inches square. Multiply this times the height (12), and you'll get the cubic inches required to fill the cylinder...or 150.796416 cubic inches. Divide by 231 (cubic inches per gallon) equalling .6528 US gallons required to fill the tube.
This pipe will hold 1,468.8 gallons of water.
31.987 gallons per foot.
much water per foot will a 5 inch pipe hold
6.23377 US gallons.
For swimming pools one big (3 inch) tablet treats about 8000 gallons
615,142 gallons of water are needed to fill this cylinder.
16 and 7/8
It would require 2,937.6 US gallons of water to fill the pipe.
You will need a maximum of 11,230 gallons of water.
The cylinder holds up to 7,943.23 gallons of water.
Exactly 5264.1669 gallons
4178 US gallons, approx.
7,646 gallons.
3961
If the bottom is flat and level, then it takes 239.38 gallons for each inch of the water's depth.
About 5869.24 gallons
A standard fire hose is 50 feet long. A hose this length with a 2-inch radius grants about 4.36 cubic feet. This volume holds 32 gallons of water.