The United States dollar is the official currency of the United States and its territories. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents.

Can US dollars be used anywhere?

As a symbol of financial strength, the U.S. dollar is accepted in many places worldwide—both officially and unofficially. Rates can vary from bank to bank, and at different currency exchange counters. ...

How many countries use dollar in the world?

There are over 20 currencies that are named dollar that are used throughout the world in nations including New Zealand, Liberia, and Hong Kong. However, these currencies are different from the U.S. dollar. The U.S. dollar is divided into 100 cents. The U.S. dollar was adopted in the late 18th century.