Cross  References: 
Shapes: 
Specific Weight 
Circle 
1 pound water = 27.7 cubic inches = 0.1198 gallons 
Area = Square of Diameter x .7854 or 
1 cubic foot water = 62.43 pounds 
Radius x 3.1416 
1 gallon water = 8.345 pounds 


Circumference = Diameter x 3.1416 
Length 

1 inch = 2.54 centimeters 
Diameter = Circumference ÷ 3.1416 
1 centimeter = 0.39 inches 

1 foot = .0305 meter 
Area of Circular Ring = .7854 x (Outside Diameter Squared minus Inside Diameter Squared) 
1 meter = 3.28 feet 



1 mile = 1.61 kilometers 
Doubling diameter increases area four (4) times 
1 kilometer = .62 miles 
Tripling diameter increases area nine (9) times 


Inches to centimeters  multiply by 2.54 
Square/Rectangle 
Centimeters to inches  multiply by .039 
Area = Length x Width 


Feet to meters  multiply by 0.305 
Diagonal = Square Root of width squared + length squared 
Meters to feet  multiply by 3.28 



Volume 
Side (square only) = Diagonal x .7071 
1 fluid ounce = 29.57 milliliters 

10 milliliters = 0.34 fluid oz 
Triangle 
1 quart = 9.46.35 milliliters 
Area = Base x 1/2 of perpendicular height 
1 liter = 1.06 US quarts 

1 gallon = 3.79 
Cube 

Area of surface = Square of side x 6 
Ounces to milliliters  multiply by 29.57 

Milliliters to ounces  multiply by 0.034 
Volume = Cube of side 


Quarts to liters  multiply by .095 
Diagonal = Side x 1.732 
Liters to quarts  multiply by 1.06 


Cylinder 
1 cubic inch = 16.39 cubic centimeters 
Area of Curved Surface = Diameter x Length x 3.1416 
1 cubic foot = 1728 cubic inches = 7.48 gallons 

1 cubic yard = 27 cubic feet = 0.7646 cubic meters 


Volume = Square of Diameter x .7854 x length 



Cone 

Area of Curved Surface = Diameter of Base x Slant Height x 1.5708 





Volume = Diameter of Base Squared x Perpendicular Height x .2618 or Area of Base x 1/3 Perpendicular Height 