How much silver in a silver quarter?

Answer 1

1932 - 1964 Silver Quarter is 90% silver

Quarters after 1964 are copper nickel clad, there is no silver. only the 1/2 dollars or "50 cent" pieces from 1965-1970 are 40% silver. There was a 1976 silver quarter as well as the proof silver state quarters.

Answer 2

90% Silver. The coins weighed 6.25 gm so 90% of that would be 5.625 gm of pure silver