Weight ‘N’ Conversion

* 1 Troy oz.  = 20 dwt.
* 1 dwt.       = 24 grains
* 1 Troy oz.  = 480 grains

Old Balance Scale

* 1 Troy oz.  = 31.1 grams
* 1 dwt.       = 1.555 grams
* 1 dwt.       = .05 oz.
* 12 Troy oz. = 1 Troy pound

*15.32 grains = 1 gram

Carat Gold
* 24 carat = 99+% gold content
* 22 carat = 91.6% gold content
* 21 carat = 87.5% gold content
* 20 carat = 83.3% gold content
* 18 carat = 75% gold content
* 15 carat = 62.5% gold content
* 14 carat = 58.5% gold content
* 10 carat = 41.7% gold content
* 9 carat   = 37.5% gold content
* 8 carat   = 33.3% gold content

Let’s take a 14k(carat) ring that weighs 6 grams and assume a gold price of $1,400 per Ounce.

-$1,400 divided by 31.1 grams = $45.01 per gram.
-$45.01 times 6 grams =$270.06 this would be the gold value of a 24k ring weighing 6 grams.
-This ring is 14k which means that it is only made up of 58.5% gold.
-Multiply 6 grams by .585 to get the grams of pure gold in this 14k ring =3.51 grams.
-Multiply 3.51 grams by $45.01 = $157.98
-This 14k 6 gram ring has $157.98 worth of pure gold in it.