A quarter-dollar coin struck in the United States in 1964 or after weights 5.670 grammes (0.200 ounces). Since its first issue in 1796, the weight of the quarter has changed little.
The first quarters weighed 6.74 grammes (0.24 ounces) and were created to the specifications of the Mint Act of 1792. From 1796 through 1838, these coins were produced. The coins that followed them were redesigned to contain more silver and ranged in weight from 6.68 to 6.22 grammes (0.23 to 0.22 ounces). Quarters produced between 1892 and 1964 are 6.25 grammes (0.22 ounces) in weight and come in a range of designs and metal compositions.