Terminology Conversion Factors To Go From To Multiply By Carats DWT 0.128603 Carats Grams 0.2 Feet Millimeters 304.8 Feet Meters 0.3048 Grams Carats 5 Grams DWT 0.6430149 Grams Troy Ounces 0.03215075 Inches Millimeters 25.4 Inches Meters 0.0254 Millimeters Inches 0.03937008 Millimeters Feet 0.00328084 Meters Inches 39.37008 Meters Feet 3.28084 DWT Carats 7.775869 DWT Grams 1.555174 DWT Troy Ounces 0.05 Troy Ounces DWT 20 Troy Ounces Grams 31.10348 Wire Hardness B&S No. Fractional Description Cold Work % DS 0 Dead Soft Annealed 1 1/4 Soft 10.7 2 1/2 Medium 20.7 3 3/4 Med-Hard 29.4 4 Full Hard 37.1 5 44.1 6 Extra Hard 50.1 7 56.2 8 Spring Hard 60.5 9 65.1 10 Extra Spring Hard 68.6 11 72.1 12 Special Spring Hard 75.1 13 77.5 14 Super Spring Hard 80.3 Wire Diameter Inch Millimeter Gauge 0.0040 0.10 38 0.0045 0.11 37 0.0050 0.13 36 0.0056 0.14 35 0.0063 0.16 34 0.0071 0.18 33 0.008 0.20 32 0.009 0.23 31 0.010 0.26 30 0.011 0.29 29 0.013 0.32 28 0.014 0.36 27 0.016 0.41 26 0.018 0.46 25 0.020 0.51 24 0.023 0.58 23 0.025 0.64 22 0.028 0.72 21 0.032 0.81 20 Inch Millimeter Gauge 0.036 0.91 19 0.040 1.02 18 0.045 1.15 17 0.051 1.29 16 0.057 1.45 15 0.064 1.63 14 0.072 1.83 13 0.081 2.05 12 0.091 2.30 11 0.102 2.59 10 0.114 2.91 9 0.128 3.26 8 0.144 3.66 7 0.162 4.12 6 0.182 4.62 5 0.208 5.19 4 0.229 5.83 3 0.258 6.54 2 0.289 7.35 1 CONVERSION GRID TO ESTIMATE AN ITEM WEIGHT IN DIFFERENT METALS To use this grid, locate intersection of desired metal and present metal. This number is your conversion factor. Multiply that number by actual known weight of present metal, e.g., to determine what an item that weighs 1.50 dwt in Sterling would weigh in 14K Yellow, go to 14K Yellow under Desired Metal column. Follow that row across until it intersects the Sterling column. This is your conversion factor (in this case 1.248). Then multiply that number 1.248 (conversion factor) by 1.5 (known weight) = 1.872 dwt. This would be the weight for the 14KYellow item. PRESENT METAL DESIRED METAL 10K YELLOW 10K WHITE 14K YELLOW 14K WHITE 18K YELLOW 18K WHITE STERLING SILVER PLATINUM 10% lr PLATINUM ALLOY 24K FINE GOLD 10K YELLOW 1.000 1.045 0.885 0.918 0.743 0.790 1.105 0.539 0.537 1.377 0.599 10K WHITE 0.957 1.000 0.847 0.878 0.711 0.756 1.057 0.516 0.514 1.318 0.573 14K YELLOW 1.13 1.181 1.000 1.036 0.839 0.893 1.248 0.609 0.607 1.556 0.677 14K WHITE 1.090 1.139 0.965 1.000 0.809 0.861 1.204 0.588 0.585 1.501 0.653 18K YELLOW 1.347 1.407 1.192 1.236 1.000 1.064 1.488 0.726 0.723 1.855 0.806 18K WHITE 1.265 1.322 1.120 1.161 0.940 1.000 1.398 0.683 0.680 1.743 0.758 STERLING 0.905 0.946 0.801 0.830 0.672 0.715 1.000 0.488 0.486 1.246 0.542 PLATINUM 1.854 1.938 1.641 1.701 1.377 1.465 2.049 1.000 0.996 2.554 1.110 10% Ir 1.862 1.946 1.648 1.708 1.383 1.471 2.057 1.004 1.000 2.564 1.115 ALLOY 0.726 0.759 0.643 0.666 0.539 0.574 0.802 0.392 0.390 1.000 0.435 24K 1.670 1.745 1.478 1.532 1.240 1.320 1.845 0.901 0.897 2.300 1.000
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