US Dollar (USD)

The US Dollar is the primary currency of United States. This currency is used by an estimated 387,532,993 people. Based on our estimate, US Dollar is the #3 most popular currency is the world.

The currency code for the US Dollar is "USD". The ISO 4217 number for this currency is 840. The currency symbol for the Dollar is "$".

US Dollar conversion rates, useful facts, and holiday schedule can be found below.

USD Currency Demographics

The primary country using the US Dollar is United States. The US Dollar is also used in American Samoa, Barbados, Bermuda, Ecuador, Micronesia, Guam, Haiti, Cambodia, Marshall Islands, Northern Mariana Islands, Panama, Puerto Rico, Palau, El Salvador, East Timor and British Virgin Islands.

There are approximately 387,532,993 people around the world who use the US Dollar. The US Dollar is the #3 most used widely currency is the world.

387,532,993 user population
Ranked #3 in the world

USD Exchange Rates

1 US Dollar equals:

Australian Dollar


Inverse: $0.74
Canadian Dollar


Inverse: $0.77


Inverse: $1.20
British Pound


Inverse: $1.34
Indian Rupee


Inverse: $0.014
Japanese Yen


Inverse: $0.0096

† Rates last updated at 40 minutes ago

‡ Rates are the interbank rate and are only available on large transactions

USD Currency Facts

USD Details

ISO 4217 CodeUSD
ISO 4217 Number840
Unit NameDollar
Currency Nicknamesgreenback, buck, green, dough, smacker, bones, dead presidents, scrillas, paper

USD Denominations

Minor Unit Namecent
Minor Unit Symbol ¢
Minor Units2
Frequently Used banknotes$1, $5, $10, $20, $50, $100
Rarely Used Banknotes$2
Frequently Used Coins1¢, 5¢, 10¢, 25¢
Rarely Used Coins$1, 50¢

USD Issuance

Central BankFederal Reserve Bank
Central Bank Website

World Bank Statistics

Estimated User Population387,532,993 people
Population Rank#3
USD Inflation Rate2.44%
Inflation Rank#63

† Population and Inflation rate as based on data from the World Bank.

‡ Corrections or suggestions? Please contact us.

USD Currency History

The table below shows the history of currencies that ultimately became the US Dollar.

Currency Active Replaced By
Ecuadorian sucre (ECS) January 1884 to February 2000 USD
Portuguese Timorese escudo (TPE) January 1959 to December 1976 USD
Rhodesian dollar (ZWC) February 1970 to December 1980 ZWD
Zimbabwean dollar (ZWD) April 1980 to July 2006 ZWN
Zimbabwean dollar (ZWN) August 2006 to July 2008 ZWR
Zimbabwean dollar (ZWR) August 2008 to February 2009 ZWL
Zimbabwean dollar (ZWL) February 2009 to April 2009 USD