What is the value of 100 grains of silver?

Question

Have a coin from 1971 stating it is 100 grains of silver.

Answer 1

for jeweler's purposes:
24 grains in a pennyweight, 20 pennyweight in one ounce. So, there are 24*20 = 480 grains in one ounce.
100 grains would then equal .48 ounce. Use that mulitpled by the current day's value for silver to get bare minimum value. But, most government minted coins are always worth a minimum of whatever denomination they are. In other words, say your coin is a "silver dollar", but doesn't have a dollar's worth of silver in it. It would still be able to be used as legal tender for the amount of one dollar.