Volume
  • 1 Barrel = 42 Gallons (US)
  • 1 Barrel = 5.615 Cu. Ft.
  • 1 Gallon (US) = 0.1336 Cu. Ft.
  • 1 Gallon (US) = 3.785 Litres
  • 1 Gallon (US) = 0.0038 Cu. Meters
  • 1 Cubic Ft. = 7.48 Gallons (US)
  • 1 Cubic Ft. = 0.1781 Barrel
  • 1 Cubic Ft. = 0.0283 Cu. Meters
  • 1 Cubic Ft. = 28.32 Litres
  • 1 Imperial Gallon = 1.2 US gallons
  • 1 Imperial Gallon = 0.1605 Cu. Ft.
  • 1 Imperial Gallon = 4.546 Litres
  • 1 Cubic Meter = 35.314 Cu. Ft.
  • 1 Cubic Meter = 264.2 Gallons
  • 1 Litre = 0.0353 Cu. Ft.
  • Volume of Cone = 1/3 Area of Base x Perp’r. Distance from vertex to plane in which base lies.
  • Volume of Sphere = 4/3*Pi*Radius^3
Pressure
  • 1 inch Water = 0.577 oz. sq. inch
  • 1 inch Water = 0.0736 inch Mercury
  • 1 oz. sq. in. = 1.73 inch Water
  • 1 oz. sq. in. = 0.127 inch Mercury
  • 1 inch Mercury = 13.6 inch Water
  • 1 inch Mercury = 7.86 oz. sq. inch
  • 1 inch Mercury = 0.4912 lbs. sq. in.
  • 1 Atmosphere = 14.7 lbs. sq. in.
  • Absolute Pressure = Gauge Pressure lbs. sq. in. + 14.7
  • 1 lb. sq. in. = 0.0703 Kilo. sq. cm
  • 1 Kilo sq. cm. = 14.223 lbs. sq. in.
  • 1 Gram sq. cm. = 0.01422 lbs. sq. in.
Area
  • 1 sq. Meter = 10.764 sq. ft.
  • 1 sq. Centimeter = .155 sq. in
  • Right & Circular Cylinder-dia. x 3.1416 x Length
  • Circle = Radius2 x 3.1416
  • Sphere = Diameter of Sphere3 x .5236
Length
  • 1 Meter = 39.37 inches
  • 1 Meter = 3.281 feet
  • 1 Kilometer = 3280.8 feet
  • 1 Foot = 0.30481 Meter
Weights
  • 1 gram Water = 0.03381 oz. Fluid
  • 1 oz. Fluid = 29.57 grams Water
  • 1 lb. = 0.4536 Kilogram
  • 1 Kilogram = 2.2046 lbs.
  • 1 Ton (2,000 lbs.) = 907.185 Kilograms
Miscellaneous Conversions
  • ° A.P.I. = 141.5 / Sp. Gr. – 131.5
  • ° Baume = 145 – 145 / Sp. Gr. (Heavier than H2O)
  • ° Baume = 140 / Sp. Gr. – 130 (Lighter than H20)
  • ° Centigrade = 5 / 9 * (° Fahrenheit) – 32
  • ° Fahrenheit = 9 / 5 * (° Centigrade) + 32