how much silver is in a half dollar 90

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A United States half dollar with a 90% silver composition contains exactly 0.3617 troy ounces of pure silver.

This amount of silver is found in specific U.S. half dollars minted before 1965. The 1964 Kennedy Half Dollar is a well-known example of a 90% silver coin. Other series, such as the Franklin Half Dollars (1948-1963) and Walking Liberty Half Dollars, also contain this same silver weight. The overall composition of these coins is 90% silver and 10% copper, which gives them durability while maintaining their precious metal value.