FORMULAS
Inches = mm times .03937
mm = Inches divided by .03937
Pi = 3.14
Area = 3.14 (Pi) times the radius squared
Circumference = Diameter times 3.14
Average Diameter of an Oval = Length plus Width divided by 2
Area of an Oval = Longest Diameter times Shortest Diameter times .7854
Outside Bezel Length = Average Diameter of Stone plus Bezel thickness times 3.14
 

EQUIVALENTS
One Troy Ounce = 1.0971 Avoirdupois Ounce = 0.0686 Avoirdupois Pound
One Troy Ounce = 31.1035 Grams = 20 Pennyweights (DWT)
One DWT (pennyweight) = 1.55517 Grams
One Kilogram = 32.15076 Troy Ounces.
One Gram = 5 Carats = .03527 Oz. Avoir. = .03215 Oz. Troy
One Avoirdupois Ounce = .91146 Oz. Troy = 28.3495 Grams = .0625 Lb.
One Avoirdupois Pound = 14.583 Oz. Troy = 453.6 Grams
One Inch = 25.4 Millimeters = 2.54 Centimeters
One Millimeter = .039 Inch = .1 Centimeter = .001 Meter
 

FRACTIONS TO DECIMAL INCHES

FRACTIONAL FEET  
One Inch equals .08 ft.
Two Inches equals .17 ft.
Three Inches equals .25 ft.
Four Inches equals .33 ft.
Five Inches equals .42 ft.
Six Inches equals .50 ft.
Seven Inches equals .58 ft.
Eight Inches equals .67 ft.
Nine Inches equals .75 ft.
Ten Inches equals .83 ft.
Eleven Inches equals .92 ft.
Twelve Inches equals 1 foot



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