How do you value Currency?

Answer 1

There are dozens of websites that post regular price updates, as well as publications. These tend to be more current than books, but somewhat less complete. Just as starters - for coins, look at the Coin World newspaper or go to the sites of organizations such as Numismedia or PCGS. For bank notes, look at Bank Note Reporter.

Answer 2

A currency is value according to its rate of exchange or what buyers are willing to pay for it. There are two methods of exchange in which to do this - the floating exchange rate, and the pegged exchange rate.

Answer 3

You can go here: http://www.xe.com/ucc/

However, if you are looking for the mathematical method you simply have to know the exchange rate and you can multiply or divide each currency by the number that will give you a value of 1.00 for the desired currency. After that, anything else is pretty simple.