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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
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