Prices are in pesos uruguayos (UR$), the official Uruguayan currency. Banknote values are 20, 50, 100, 200, 500, 1000 and 2000. There are coins of one, two, five, 10 and 50 pesos.
US dollars are commonly accepted in major tourist hubs, where many accommodations quote US$ prices. However, beware of poor exchange rates at hotel desks. In many cases, you’ll come out ahead paying in pesos. Away from the touristed areas, dollars are of limited use.
Unlike Argentina, Uruguay has no black or 'blue' market offering higher exchange rates for US and European banknotes.