The three-letter ISO 4217 code for the Canadian dollar is CAD.
ISO 4217 codes provide standardized identifiers for currencies in banking, accounting, payments, travel, and foreign-exchange trading. The first two letters generally relate to the country or territory, while the final letter commonly identifies the currency itself; CAD combines Canada’s country code, CA, with D for dollar.
The Canadian dollar was introduced in 1858 and is issued by the Bank of Canada. Its dollar sign can be confused with those of other dollar currencies, so forms such as C$, CA$, and Can$ also appear. In international financial systems, however, CAD is the unambiguous standard code.
A common mix-up is assuming that CAN is the code because it resembles Canada’s three-letter country code. Canada’s ISO 3166-1 alpha-3 country code is CAN, while its currency code is CAD. The Canadian dollar is also nicknamed the loonie, after the common loon pictured on the one-dollar coin.