It's 90% silver and 10% copper with a total weight of 2.5 grams, which makes 2.25 grams of silver.
0.0723 troy ounces of silver.
90%, or 2.25 grams.
The value of a 1964 dime is approximately $3.00. Unfortunately the date on the coin does not matter as much as the amount of silver in the coin.
U.S. silver coins dated 1964 and earlier are almost all composed of 90% silver and 10% copper.
For the answer, visit: http://www.coinflation.com/coins/1946-1964-Silver-Roosevelt-Dime-Value.html
The 1964 Roosevelt dime is the most common of all silver dimes, it's worth about $2.00 only for the silver.
A 1964 dime is made of 90% silver and 10% copper, known as a "silver dime" because of its silver content. These dimes were the last to be minted with silver before the composition changed to a copper-nickel alloy in 1965.
Dime minted before 1965 contain 90% silver. With a total weight of 2.5 grams, that makes 2.25 grams of silver per dime.
If it's a US dime dated 1964 or before it's silver
Roosevelt dimes from 1946 to 1964 are 90% silver. The ASW. (Actual Silver Weight) is 0.07234oz of pure silver.
If the coins show any wear, value is about $2.00 just for the silver.
A 1964 US dime is so common most are valued only for the silver at about a dollar.