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How much do American silver coins weigh in grams?

Jon R. Warren
This list gives approximate weights in grams of American silver coins prior to 1964. It is important to note that pre-1964 American silver coins contain 90% silver, not 100%. There are 31.1 grams in a troy ounce. Silver is bought and sold in troy ounces on the commodities markets.

Coin Type Grams
Silver Dollars (pre-1965)   26.7 grams
Half Dollars (pre-1965)      12 grams
Quarters (pre-1965)            5.8 grams
Dimes (pre-1965)               2.5 grams