It's worth at least $10 (as of 3 July 2012) for its silver content. As far as collector value, that depends on factors such as the date, mint mark, and condition.
At current silver prices, a '61 Franklin half is worth just under $10.
If you mean a 1998 Kennedy half dollar, the coin has no silver in it and is worth face value.
Half dollars dated 1964 and earlier are 90% silver and are worth about $11 in silver content. Keep in mind that proof, error, and key date coins may be worth much more than pure silver content. And from 1965-1970 the half dollar was 40% silver and is worth about $4.50 in silver content. Half dollars dated 1971 and later are not silver unless found in a US mint silver proof set. Note that any half dollar made during 1965-69 is only partially silver and is worth about $3. Halves dated 1971 and later contain NO silver and are only worth 50 cents.
A Kennedy Half Dollar that was minted in 2007 and carries a mint mark of "S," was produced in clad and silver. The clad in a proof state is worth: $4; in silver, the value is: $7.00.
With silver over $30.00 per ounce the intrinsic value is about $11.00.
The 1956 US half dollar, or Ben Franklin half dollar, is ninety percent silver. Over four million were produced. It is worth between twelve and thirty-five dollars depending on its condition.
.14792 oz of pure silver in a 40% half dollar.
Based solely on a silver price of $33.52 per (troy) ounce, a 40% Kennedy Half is worth $4.9573 in silver. There is .1479 troy ounces of silver in each one.
HALF a dollar - $0.50
A 1969 silver Kennedy half dollar is worth $5 inn perfect condition. The value of the silver is worth $2.87.
At current silver prices, a '61 Franklin half is worth just under $10.
If you mean a 1998 Kennedy half dollar, the coin has no silver in it and is worth face value.
The 1966 Kennedy half dollar is 40% silver and worth about $5.00.
Kennedy is on the HALF dollar, not dollar. There were no U.S. silver dollars minted in the 1960s. The '64 Kennedy half is 90% silver and extremely common, currently worth about $10.50 for the silver.
If the coin is a US Kennedy half dollar dated 1974 it has no silver in it and is face value.
Half dollar minted 1965-70 are 40% silver and currently worth around $4.
It's worth about $15.00 for the silver.