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Weight Conversion Table for Precious Metals & Stones

  
 
Troy Weight
 
Carat Weight
  
 
Used in weighing the precious metals
 
Used in weighing the precious and semi-precious stones
 
 
24 grains = 1 pennyweight (DWT)
  
(PS. The term "Karat" refers to the quality of purity in gold.)
 
 
20 DWT = 1 ounce Troy
  
 
  
 
12 ounces = 1 pound Troy
  
1 carat = 3 54/625 grains Troy
  
 
5,760 grains = 1 pound Troy
  
1 carat = .007 oz. Avoir
  
 
480 grains = 1 Troy oz.
  
1 carat = 1/5 gram
  
         
 
1 kilogram = 2.68 pounds
  
The carat is further divided into points for simple measurement:
  
 
1 kilogram = 32.15 Troy oz.
  
1 carat = 100 points
  
 
1 kilogram = 2.2046 lbs. Avoir
  
1/2 carat = 50 points
  
 
1 kilogram = 35.2740 oz. Avoir
  
1/4 carat = 25 points
  
 
1 kilogram = 15,432 grains
  
1/8 carat = 12-1/2 points
  
         
 
Troy oz. = 1.0972 Avoir oz.
      
         
 
Avoirdupois Weight
 
Gram Weight
 
 
Used in weighing base metals
 
1 gram = 15.43 grains Troy
  
 
16 drams (or drachms) = 1 oz. Avoir
  
1.55 grams = 1 pennyweight (DWT)
  
 
16 ounces = 1 pound Avoir
  
31.104 grams = 1 ounce Troy
  
 
16 ounces = 7,000 grams
  
28.35 grams = 1 ounce Avoir
  
 
28 pounds = 1 quarter English
  
 
  
 
4 quarters = 1 hundredweight (cwt.)
  
1 grain = 0.0648 grams
  
 
20 hundredweight = 1 ton Avoir
  
1 grain = 64.80 milligrams
  
     
1 milligram = .015432 grams
  
 
1 pound Avoir = 14.5833 Troy oz.
  
1 gram = .035274 Avoir oz.
  
 
1 ounce Avoir = 0.914 Troy oz.
  
1 gram = .032151 Troy oz.
  
 
1 pound Avoir = 7,000 grains
      
 
1 ounce Avoir = 437.5 grains
      
 
1 pound Avoir = .4359 kilo
      
         
  To convert -> to Multiply by  
  Carats -> DWT's .12860  
  Carats -> Grams .2  
  DWT's -> Carats 7.776  
  DWT's -> Grams 1.5552  
  DWT's -> Ounces(troy) .05  
  Grams -> Carats 5.0  
  Grams -> DWT's .64301  
  Inches -> Millimeters 25.4  
  Kilograms -> Ounces(troy) 32.1507  
  Kilograms -> DWT's .643014  
  Millimeters -> Inches .03937  
  Ounces(Av) -> Ounces(troy) .91146  
  Ounces(Av) -> Grams 28.3495  
  Ounces(troy) -> Grams 31.1035  
  Ounces(troy) -> Ounces(Av) 1.0971  
  Pounds(Av) -> Grams 453.592  
  Pounds(Av) -> DWT's 291.666  
  Pounds(Av) -> Ounces(troy) 14.583  
     
  Back to Product Knowledge Base  

 

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