Brazilian monetary unit: Real (plural, reais). There are 100 centavos to the real (R$).
Most major international credit cards are accepted in Brazil (Visa is more commonly accepted than Mastercard)
The US dollar is by far the most widely accepted foreign currency in Brazil. In the main cities, including Búzios, there is little problem in changing other foreign currencies, such as pounds. There is also an extensive network of ATMs at which visitors can use their UK cash cards, although you should check with your bank before departure that your card can be used overseas.
As when visiting any country, it is worth getting hold of some low denomination notes and coins on arrival. You can change some money directly at the airport.
Click here and convert your currency to Brazilian Reais (R$).