Euro calculator Euro calculator A euro calculator is a very popular type of calculator in European countries (see eurozone) that adopted the euro as their official monetary unit. It functions like any other normal calculator, but it also includes a special function which allows one to convert a value expressed in the previously official unit (the peseta in Spain, for example) to the new value in euros, or vice versa. Its use became very popular within the population and commerce of these countries especially during the first few months after adopting the euro. As so many were produced, they are also found
Mark (currency) and could be transferred by endorsement, and were accepted as payment. They could also be redeemed. This currency proved to be very stable. Following German unification in 1871, the country adopted the German gold mark (officially known just as the "mark") as its currency in 1873. The name was taken from the mark banco. Initially, the coins and banknotes of the various predecessor currencies, such as the , the , and the guilder, continued to circulate, and were treated as fixed multiples of the new unit of account, similarly to the introduction period of the euro between 1999 and 2002.