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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
If temperature is kept constant, the volume of a given mass of gas is inversely proportional to the pressure which is exerted upon
it.
Circumference of a Circle
Circumference = 2
r
=
d
= 3.14159
d
Area =
r
2
= = .78539d
2
d
2
4
Right Cylinder
r = radius
h = length
Volume =
r
2
h
Surface Area = 2
r (r + h)
If end planes are parallel but not at 90° to h, the same
formulas apply, but a slice at 90° through the cylinder must be
used to determine r.
Weight Conversion Constants
Grams x .03527 = Ounces (Avd.)
Grams x .033818 = Fluid Ounces (Water)
Kilograms x 35.27 = Ounces (Avd.)
Kilograms x 2.20462 = Pounds (Avd.)
Ounces (Avd.) x 28.35 = Grams
Fluid Ounces (Water) x 29.57 = Grams
Ounces (Avd.) x .02835 = Kilograms
Pounds (Avd.) x .45359 = Kilograms
Length Conversion Constants
Millimeters x .039370 = Inches
Meters x 39.370 = Inches
Meters x 3.2808 = Feet
Meters x 1.09361 = Yards
Kilometers x 3,280.8 = Feet
Kilometers x .62137 = Statute Mile
Kilometers x .53959 = Nautical Miles
Inches x 25.4001 = Millimeters
Inches x .0254 = Meters
Feet x .30480 = Meters
Yards x .91440 = Meters
Feet x .0003048 = Kilometers
Statute Miles x 1.60935 = Kilometers
Nautical Miles x 1.85325 = Kilometers
Conversion Constants and Formulas