No one dollar coins were made in 1946. The coin is a 1946 Walking Liberty Half Dolllar that is very common and most are valued at $7.00-$9.00
a dollar
value of 1845 us five dollar coin
Please turn the coin over and check the denomination on the back. It's a half dollar, not a dollar. There's more information at the question "What is the value of a 1946 US half dollar?"
The coin needs to be seen for an accurate assessment, but most have retail values of $80.00-$135.00 depending on the grade of the coin.
It's a common dollar coin that's face value
If you mean a US dollar coin dated 1946 it doesn't exist. It appears that US minting of dollar coins was suspended from 1936 until 1971 with the Eisenhower dollar.
The 1946 Walking Liberty Half dollar is a very common high mintage coin, most show heavy wear with a average retail value of $14.00 in circulated condition.
a dollar
Please turn the coin over and check the denomination on the back. It's a half dollar, not a dollar. There's more information at the question "What is the value of a 1946 US half dollar?"
value of 1845 us five dollar coin
The coin needs to be seen for an accurate assessment, but most have retail values of $80.00-$135.00 depending on the grade of the coin.
It's a common dollar coin that's face value
One dollar.
There was no fifty dollar US gold coin produced in 1940.
The last US silver dollars were made in 1935. If you turn your coin over you should find that its denomination is a HALF dollar. There's more information at the Related Question.
Check that coin again. The U.S. has never minted a two dollar coin.
$1.00