Polish currency is Polish złoty (PLN or zł), 1 złoty equals 100 groszy (gr).
There are 6 banknotes: 10, 20, 50, 100, 200, 500 zł. Coins include: 1, 2, 5, 10, 20 & 50 groszy and also 1, 2, & 5 złotych.
If you wish to exchange euro (or other currency) to PLN you have you can find exchange desks at border crossings, airports, railway stations, travel offices, hotels and special exchange offices called “kantor” in Polish. No commission fee is charged at kantors. Cash machines (ATMs) are very common.
You can open an account in Poland (usually only passport is needed) or get money directly from the account in your home country through an ATM. Credit cards are in common use in Poland. Pay pass also became very popular.