Unless your coin is in absolutely top condition it is only worth $11 in 90% silver scrap.
The coin has NO silver and is face value
It is a common date/mintage and in circulated condition it is worth around $10 for the silver in it.
One dollar
No president is on a 1961 half dollar. It depicts Benjamin Franklin who was a Founding Father, statesman, diplomat, inventor, writer, and philosopher ... but never president.
There was no half dollar released in 1961 that featured Washington. Check the date/design on your coin and post a new question.
Current dollar vaule againts euro is 1.36.
A bit more than $10 in circulated condition for the 90% silver content, and if it is uncirculated or proof it could be worth more.
Current retail value is $8.00
Turn the coin over and look at the denomination on the back. It's a half dollar.
1961 is not a hard date to come by for Franklin half dollars. Actually all Franklin half's (1948-1963) regardless of mintmark are common and most circulated coins are valued for the silver only, about $12.00
It's a common date, currently worth just under $10.
The easy thing to do is type in 1961 doubled-die proof Franklin into your search box and click on images.