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Weight Conversion Table for Precious Metals & Stones
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Troy Weight |
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Carat Weight |
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Used in weighing the precious metals |
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Used in weighing the precious and semi-precious stones |
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24 grains = 1 pennyweight (DWT) |
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(PS. The term "Karat" refers to the quality of purity in gold.) |
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20 DWT = 1 ounce Troy |
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12 ounces = 1 pound Troy |
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1 carat = 31/16 grains Troy |
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5,760 grains = 1 pound Troy |
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1 carat = .007 oz. Avoir |
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480 grains = 1 Troy oz. |
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1 carat = 1/5 gram |
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1 kilogram = 2.68 pounds |
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The carat is further divided into points for simple measurement: |
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1 kilogram = 32.15 Troy oz. |
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1 carat = 100 points |
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1 kilogram = 2.2046 lbs. Avoir |
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1/2 carat = 50 points |
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1 kilogram = 35.2740 oz. Avoir |
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1/4 carat = 25 points |
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1 kilogram = 15,432 grains |
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1/8 carat = 12-1/2 points |
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Troy oz. = 1.0972 Avoir oz. |
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Avoirdupois Weight |
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Gram Weight |
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Used in weighing base metals |
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1 gram = 15.43 grains Troy |
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16 drams (or drachms) = 1 oz. Avoir |
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1.55 grams = 1 pennyweight (DWT) |
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16 ounces = 1 pound Avoir |
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31.104 grams = 1 ounce Troy |
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16 ounces = 7,000 grams |
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28.35 grams = 1 ounce Avoir |
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28 pounds = 1 quarter English |
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4 quarters = 1 hundredweight (cwt.) |
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1 grain = 0.0648 grams |
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20 hundredweight = 1 ton Avoir |
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1 grain = 64.80 milligrams |
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1 milligram = .015432 grams |
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1 pound Avoir = 14.5833 Troy oz. |
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1 gram = .035274 Avoir oz. |
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1 ounce Avoir = 0.914 Troy oz. |
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1 gram = .032151 Troy oz. |
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1 pound Avoir = 7,000 grains |
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1 ounce Avoir = 437.5 grains |
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1 pound Avoir = .4359 kilo |
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