Conversions in Avoirdupois and Troy

This is used for Silver, Gold and Gems
A troy ounce weighs about 10% more than a Avoirdupois ounce. 
24 grains = 1 pennyweight = 1.5552 grams
1 gram = .64 pennyweight
1 pennyweight = 1.56 grams or .05 troy ounce
20 pennyweight = 1 troy ounce = 31.1035 grams 
12 ounces = 1 pound troy = 373.24 grams
Avoirdupois Ounces to pennyweight multiply by 18.2 
Avoirdupois ounces to grams multiply by 28.35 
Troy ounces to grams multiply by 31.1
Troy ounces to pennyweight multiply by 20 
Troy ounces to pounds troy, divide by 12
Pennyweight to grams multiply by 1.56 
Pennyweight to troy ounces multiply by .05
Grams to pennyweight multiply by .64
Grams to troy ounces multiply by .032
Grams to carats multiply by 5
Carats to grams multiply by .2
Carats to Points multiply by 100
Points to carats multiply by .01



 

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