The Czech Republic uses the Korun, not the Euro, as their currency. Below is a currency converter to show the exchange rate between the Korun and Dollar at any moment. Things that tend to cost more in the Czech Republic are electronics, brand name clothes, and brand name groceries. In comparison, things that usually cost less in the Czech Republic are beer, cigarettes, and restaurant food. In order to get the most competitive exchange rate, most sources recommend changing at an ATM when you get there.

Prices in Prague vs. The United States

Traditional Czech Food
CZK=80 US=4
CZK=23 US=1.15
CZK=40 US=2
McDonald's Meal
CZK=105 US=5.25
Cup of Water
CZK=35 US=1.72
CZK=800 US=40