Jewelry Weights

Troy Weight

Used in weighing the precious metals.

24 grains = 1 pennyweight (dwt.)

20 dwt = 1 ounce Troy

12 ounces = 1 pound Troy

5760 grains = 1 pound Troy

480 grains = 1 Troy oz.

1 kilogram = 2.68 pounds | 1 kilogram = 32.15 Troy oz. | 1 kilogram = 2.2046 lbs. Avoir | 1 kilogram = 35.2740 oz. Avoir | 1 kilogram = 15,432 grains

Troy oz. – 1.0972 Avoir oz.

Carat Weight

Used in weighing precious and semi-precious stones. (The term “carat” refers to the quality of purity in gold.)

1 carat = 31/16 grains Troy

1 carat = .007 ounce Acoir

1 carat = 1/5 gram

The carat is further divided into points for simple measurement: 1 carat = 100 points | 1⁄2 carat = 50 points | 1⁄4 carat = 25 points | 1/8 carat = 12 1⁄2 points

Avoirdupois Weight

Used in weighing base metals.

16 drams (or drachms) = 1 oz. Avoir

16 ounces = 1 pound Avoir

16 ounces = 7,000 grains

28 pounds = 1 quarter English

4 quarters = 1 hundredweight (cwt.)

20 hundredweight = 1 ton Avoir

1 pound Avoir = 14.5833 Troy oz. | 1 ounce Avoir = 0.914 Troy oz. | 1 pound Avoir = 7,000 grains | 1 ounce Avoir = 437.5 grains | 1 pound Avoir = .4359 kilo.

Gram Weight

1 gram = 15.43 grains Troy

1.555 grams = 1 pennyweight (dwt.)

31.104 grams = 1 ounce Troy

28.35 grams = 1 ounce Avoir

1 grain = 0.0648 grams | 1 grain = 64.80 milligrams | 1 milligram = .015432 grams | 1 gram = .035274 Avoir oz. | 1 gram = .032151 Troy oz.

D.D. Designs Resources

[The Four C's]

[About Gold]

[Birth Stones]

[Gem Care]

[Why Does Gold Discolor Fingers?]

[Measuring Stones]

[Traditional Wedding/Anniversary Stones]

[Weights]

[Diamond Weights & Sizes]