This may be a stupid question but here goes. I was wondering if anyone has a formula or has ran across a website that updates and breaks down the silver value of individual U.S. coins keeping up with the current spot price? I would just like to get some idea in my head when I go out looking over the yard sales and pawnshops. In short I suck at math and am looking for a lazy way to know the current melt value of U.S. coins without multiplying grams everytime I want to check the price. (Mercury, Barbers, Walkers, Franklins ect.)