The Rial has been Iran’s official currency since March 23, 1932. It has suffered under years of economic sanctions, but the central bank has been keen to dampen any sharp rise in the currency due to optimism over the lifting of the sanctions after Iran's nuclear deal with world powers in 2015. In recent years, Iranians in their daily lives use Toman which is equal to 10 Rial.

See here for the latest official exchange rates.