How much silver is a silver dollar?

Answer 1

When the silver content is rounded to the nearest hundredth it is .77 ounces of pure silver.

Answer 2

True silver dollars minted up to 1935 are worth at least 10X face value for their metal content, but probably much more as collectibles.

Circulating $1 coins dated 1971 and later are often referred to as "silver dollars" but they're made of copper-nickel or brass and are only worth one buck.

American Eagle 1 oz bullion coins carry an artificial denomination of $1 but are valued at the price of 1 ounce of silver.

Without knowing what type of dollar you have, and its date and mint mark for older ones, it's not possible to provide any more-specific information.