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To find the weight of an article in a metal different from that in which it is now made:
  1. Find the present metal in the first vertical column.
  2. Multiply the present weight by the factor in the same horizontal row under the new metal. Example: A sterling silver ring weighs 8 grams, what will it weigh in 14kt.
  3. Along the horizontal row marked Stg in the first column under the heading 14 Kt we find 1.25 x 8 = 10 grams, weight in 14 Kt.

Weight Comparison Chart
  Pt. F.G. 22kt 18kt 14kt 10kt 9kt F.S. Stg
Pt. 1.00 0.90 0.82 0.70 0.60 0.53 0.53 0.49 0.48
F.G. 1.11 1.00 0.91 0.78 0.67 0.59 0.58 0.54 0.54
22kt 1.22 1.10 1.00 0.86 0.73 0.65 0.65 0.60 0.59
18kt 1.42 1.28 1.16 1.00 0.85 0.76 0.75 0.69 0.68
14kt 1.66 1.50 1.36 1.17 1.00 0.89 0.88 0.81 0.80
10kt 1.88 1.69 1.54 1.32 1.13 1.00 0.99 0.92 0.90
9kt 1.90 1.71 1.56 1.34 1.14 1.01 1.00 0.93 0.92
F.S. 2.04 1.84 1.68 1.44 1.23 1.09 1.08 1.00 0.99
Stg 2.07 1.87 1.70 1.46 1.25 1.11 1.09 1.01 1.00
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