How much is a 5fr coin worth in amaerica?

Several countries use, or at some time in the past have used, a currency unit called the franc. In Europe, this would include France, Belgium, and Switzerland. There are other countries that were under French control in the past and had that name for their monetary unit. So, in the first place, the answer depends on what country this coin comes from. Also, with any coin viewed as a collector's item, the value will depend on the condition it is in, the age, and how rare it is. If there are many examples from a given year and few from a different year, that will also affect the value.