The Indonesian Rupiah (IDR) is the official currency of Indonesia. In Indonesia the word perak meaning silver is also used for the Rupiah. Rupiah comes from the indian word Rupiya. Rupiah is divided into 100 Sen. With the historical inflation in Indonesia having $1 US being more worth than 1000 Rupiah the Sen has become obsolete. There are 5 coins ranging from 50 to 1000 Rupiah and 7 banknotes ranging from 1000 to 100.000 Rupiah. With its history of volatility and inflation the Indonesian Rupiah is still considered a bit risky.