An ISO currency code is a three-letter alphabetic code defined by the ISO 4217 international standard. It uniquely identifies each currency worldwide — for example, USD for the United States Dollar, EUR for the Euro, and JPY for the Japanese Yen. These codes are used in banking, foreign exchange trading, international commerce, and financial software systems to avoid ambiguity.

The alphabetic code (e.g., USD) is a three-letter code typically derived from the country name and currency name — widely used for display and human readability. The numeric code (e.g., 840) is a three-digit number assigned to each currency, primarily used in systems where Latin script is not supported or for automated processing. Both represent the same currency and are part of the ISO 4217 standard.

There are currently over 160 active ISO 4217 currency codes in circulation globally. This includes major currencies like USD and EUR, as well as currencies of smaller nations, overseas territories, and special economic zones. The standard also reserves certain code ranges for private use and includes codes for precious metals (like XAU for gold) and supranational currencies.

The Euro (EUR, numeric code 978) is the official currency of the Eurozone, which includes 20 EU member states: Austria, Belgium, Croatia, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Slovakia, Slovenia, and Spain. Additionally, several non-EU territories and microstates also use the Euro.

No, they are different. A currency code (like USD, EUR) is a standardized three-letter identifier per ISO 4217, used in formal financial contexts. A currency symbol (like $, €, £) is a graphical shorthand used in everyday pricing and retail. A single symbol can represent multiple currencies — for example, $ is used by the US Dollar, Canadian Dollar, Australian Dollar, Mexican Peso, and many others. Always use the ISO code for clarity in international transactions.

Use this lookup tool: type your country name in the search box above, and you'll instantly see the correct ISO 4217 alphabetic and numeric codes. For international wire transfers (SWIFT), you typically need the three-letter alphabetic code (e.g., GBP for British Pounds). Banks and payment platforms like PayPal, Wise, and Stripe all rely on ISO 4217 codes to process cross-border payments accurately.

ISO 4217 is the international standard published by the International Organization for Standardization (ISO) that defines codes for currencies, funds, and precious metals. The standard was first published in 1978 and is regularly updated to reflect new currencies, redenominations, and changes in global monetary systems. The code structure uses two-letter country codes from ISO 3166-1 plus one letter for the currency name.

Yes. Some countries recognize multiple official currencies. For example, Zimbabwe uses the Zimbabwe Dollar (ZWL) alongside the US Dollar (USD) and South African Rand (ZAR). Cuba has the Cuban Peso (CUP). El Salvador uses both the US Dollar and Bitcoin as legal tender. In such cases, the ISO 4217 standard may assign separate codes to each recognized currency.

Cryptocurrencies are not officially part of ISO 4217. However, the standard reserves codes starting with "X" for non-national currencies and private use. For example, XBT is widely used as an unofficial code for Bitcoin (though not yet formally adopted by ISO). Some countries like El Salvador have adopted Bitcoin as legal tender, but it still lacks a formal ISO 4217 code as of 2025.

In ISO 4217, the minor unit indicates how many decimal places a currency uses. Most currencies have a minor unit of 2 (e.g., USD uses cents, so $1.00 = 100 cents). Some currencies like the Japanese Yen (JPY) and South Korean Won (KRW) have a minor unit of 0, meaning they are typically quoted as whole numbers without decimal subdivisions — 1 Yen is the smallest practical unit in everyday use.