Measurement Systems

Avoirdupois

The system used for business and commerce and the most common system used in the US. Measurements are ounces and pounds.

Troy

The system used for measuring precious metals such as gold, silver, platinum. Common measurements are grains,grams, pennyweights,troy ounces and troy pounds.

Gram =
pennyweight =
Avoirdupois Ounce =
Troy Ounce =
Troy Ounce =
Troy Pound =

15.43 grains (GN)
 1.555 grams (G)
28.35 grams
31.103 grams
20 Pennyweights (dwt)
12 Troy ounces (ozt)

Gold karat weight

A karat is the measurement of how pure an item made from gold is. Pure gold (24K) is too soft to make jewelry and is usually mixed with other alloys such as silver, copper, or zinc. The higher the karat is, the more % gold the item contains and the higher the value. Higher karat value gold items also have a brighter yellow color.

24 k
22 k
18 k
14 k
10 k
 8 k

100 % Pure!
91.6 %
 75 %
58.5 %
41.7 %
33.3 %