A Currency Converter tool is a program or website that allows users to convert one currency into another. It works by using current exchange rates to calculate the value of one currency in terms of another currency.

Currency converters are commonly used for financial transactions such as international trade, foreign investment, and travel. They can also be useful for individuals who want to keep track of their spending when traveling abroad, or for those who want to compare the cost of goods and services in different countries.

Currency converter tools typically allow users to enter the amount of money they want to convert, select the currencies they are converting from and to, and then display the converted amount. Some currency converters may also provide historical exchange rates and charts to help users track currency fluctuations over time.

Currency converters can be found as standalone programs, mobile apps, or web-based tools that can be accessed through a web browser. Some currency converters may also provide additional features such as currency news, market analysis, and alerts for significant currency fluctuations.