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Technical
Water Data and Formulas

(no losses included)
1 gallon water = 231 cubic inches = 8.333 pounds
Water Gallons per Minute Discharge for a Given
Level Nominal Pipe Diameter (inches)
1 pound of water = 27.7 cubic inches (inches) 5 6 8 10 12
1 cubic foot water = 7.5 gallons = 62.5 pounds (salt water 5 163 --- --- --- ---
weighs approximately 64.3 pounds per cubic foot) 6 195 285 --- --- ---
7 228 334 580 --- ---
Pounds per square inch at bottom of a column of water = 8 260 380 665 1060 ---
height of column in feet x .434 9 293 430 750 1190 1660
10 326 476 830 1330 1850
Horsepower to Raise Water 11 360 525 915 1460 2020
If pumping liquid other than water, multiply the gallons per 12 390 570 1000 1600 2220
minute below by the liquids specifc gravity 13 425 620 1080 1730 2400
14 456 670 1160 1860 2590
Horsepower = gallons per minute x total head in feet 15 490 710 1250 2000 2780
3960 16 520 760 1330 2120 2960
17 550 810 1410 2260 3140
Gallons Per Minute through a Pipe 18 590 860 1500 2390 3330
GPM = .0408 x pipe diameter inches x feet/minute water 19 620 910 1580 2520 3500
2
velocity 20 650 950 1660 2660 3700
21 685 1000 1750 2800 3890
Weight of Water in a Pipe 22 720 1050 1830 2920 4060
Pounds water = pipe length feet x pipe diameter inches x .34 23 750 1100 1910 3060 4250
2
24 --- 1140 2000 3200 4440

Measurement Information

Measures of Pressure

1 Pound Per Square Inch = 144 Pounds Per Square Foot = 0.068 Atmosphere = 2.042 Inches of Mercury at 62°F = 27.7 Inches
of Water at 62°F = 2.31 Feet of Water at 62°F.
1 Atmosphere = 30 Inches of Mercury at 62°F = 14.7 Pounds Per Square Inch = 2116.3 Pounds Per Square Foot = 33.95 Feet of
Water at 62°F.

1 Foot of Water at 62°F = 62.355 Pounds Per Square Foot = 0.433 Pounds Per Square Inch.

1 Inch of Mercury at 62°F = 1.132 Feet of Water = 13.58 Inches of Water = 0.491 Pounds Per Square Inch.
Column of Water 12 Inches High, 1 Inch in Diameter = .341 Pounds

Length Conversion Constants
Millimeters x .039370 = Inches Inches x 25.4001 = Millimeters
Meters x 39.370 = Inches Inches x .0254 = Meters
Meters x 3.2808 = Feet Feet x .30480 = Meters
Meters x 1.09361 = Yards Yards x .91440 = Meters
Kilometers x 3,280.8 = Feet Feet x .0003048 = Kilometers
Kilometers x .62137 = Statute Mile Statute Miles x 1.60935 = Kilometers
Kilometers x .53959 = Nautical Miles Nautical Miles x 1.85325 = Kilometers

Weight Conversion Constants

Grams x .03527 = Ounces (Avd.) Ounces (Avd.) x 28.35 = Grams
Grams x .033818 = Fluid Ounces (Water) Fluid Ounces (Water) x 29.57 = Grams
Kilograms x 35.27 = Ounces (Avd.) Ounces (Avd.) x .02835 = Kilograms
Kilograms x 2.20462 = Pounds (Avd.) Pounds (Avd.) x .45359 = Kilograms

Z 276 800.789.1718 Dixon Sanitary 2014