Money Information
Currency
The Czech Republic has its own currency, Czech Crown (CZK). Its local name is "koruna ceska", you may see the abbreviation "Kc" in shops etc. One hundredth of the crown is called "haler".
Euro currency is not used in the Czech Republic, although there are some shops and stores that accept euros. Such stores are still exceptional. However, there are many exchange offices in Prague which accept major currencies, such as U.S. dollars and euros.
The exchange rate is approximately 33 CZK for 1 euro, or 27 CZK for 1 U.S. dollar. You can find exact rates (daily updated) at the Czech National Bank web page. Please note that these are mean exchange rates for bank purposes. Thus, count on receiving a little less crowns for your money in exchange offices (they want to profit, of course).
Banknotes and coins: There are 0.5 CZK (50 haler), 1 CZK, 2 CZK, 5 CZK, 10 CZK, 20 CZK, and 50 CZK coins and 20 CZK, 50 CZK, 100 CZK, 200 CZK, 500 CZK, 1000 CZK, 2000 CZK, and 5000 CZK banknotes. The pictures of them can be seen at the Czech National Bank web page. There is also a description of protective elements.
Note: 0.1 CZK (10 haler) and 0.2 CZK (20 haler) coins were in use until several months ago. Nowadays, they are not valid anymore and the smallest coin is half-crown. Anyway, the prices in shops are often given in tenths of CZK. In this case, they are sumed together and the total price of the purchase is then rounded to the nearest 0.5 CZK value.
Credit Cards
Major international credit cards are widely accepted, especially Visa and EuroCard/MasterCard. American Express and Diners' Club are rarely seen, do not rely on them. There are also many shops and restaurants that do not accept some or any cards. Please always check for Visa or EC/MC logo at the door.
There are plenty of ATMs in Prague city center, thus, it should be no problem to get some cash. The ATMs usually accept Visa and EC/MC (watch for logos again). Anyway, it could be quite expensive to use ATMs. Check with your card issuer if you want to know exact charges.