Water Data and Formulas

1 gallon water = 231 cubic inches = 8.333 pounds

1 pound of water = 27.7 cubic inches

1 cubic foot water = 7.5 gallons = 62.5 pounds (salt water weighs approximately 64.3 pounds per cubic foot)

Pounds per square inch at bottom of a column of water = height of column in feet x .434

1 miner's inch = 9 to 12 gallons per minute

Horsepower to Raise Water
If pumping liquid other than water, multiply the gallons per minute below by the liquids specific gravity

Gallons Per Minute through a Pipe
GPM = .0408 x pipe diameter inches² x feet/minute water velocity

Weight of Water in a Pipe
Pounds water = pipe length feet x pipe diameter inches² x .34