It's a fantastic question, and understanding the answer is crucial for anyone interested in collecting or investing in silver. The amount of silver in a "silver dollar" isn't a single number; it completely depends on which coin you're holding, a detail the provided search result snippets unfortunately don't clarify.
The coins most people picture when they hear "silver dollar" are the classic Morgan and Peace dollars, which were minted for circulation up until 1935. These iconic coins were made from a composition of 90% silver and 10% copper. When you do the math, this comes out to approximately 0.7734 troy ounces of pure silver per coin. So, for these historic pieces, you're getting just over three-quarters of an ounce of actual silver.
However, if you're talking about the modern American Silver Eagle, the story changes entirely. These coins, first minted in 1986, are bullion coins created specifically for investors. They are stamped with a face value of one dollar, but their true value is in their metal content. Each American Silver Eagle is guaranteed by the U.S. government to contain exactly one full troy ounce of .999 fine silver.
To add a bit more complexity, there were also Eisenhower dollars minted from 1971 to 1978 for collectors that contained 40% silver, which equates to about 0.316 troy ounces. In summary, if you have an old, classic silver dollar, you can count on it having about 0.77 ounces of silver. If you have a modern American Silver Eagle, you have precisely one ounce.
