Copper

Copper is a precious metal that is used in Faerûn as the baseline of most currency. When used as currency, it is usually cast into copper pieces (cp) of a standard weight.

Worth
Most coins in Faerûn work off of the silver and gold standard, with copper pieces (cp) being worth 1/100th of a gold piece (gp) and Silver pieces (sp) being worth 1/10 of a GP. electrum coins are worth 5gp, and platinum coins are worth 10gp.

Conversion
Simplified: 1000cp = 100sp = 10gp = 2ep = 1pp