Currency Units

Because of the dynamic nature of currency values, internet connectivity is required to retrieve up-to-date exchange rates.

By default, the Wolfram Language will automatically query (RefLink[FinancialData, paclet:ref/FinancialData]) for the latest exchange rate information when doing arithmetic or unit conversion.

UnitConvert[Quantity[19.,"SwissFrancs"],"Euros"]

Quantity[1,"USDollars"]+Quantity[1,"Euros"]

When no internet connectivity is available, a (RefLink[String, paclet:ref/String]) representing the exchange ratio is returned instead:

Quantity[1,"USDollars"]+Quantity[1,"Euros"]

%/."EUR/USD"->1.2

This is the same string that can be used to retrieve exchange rate information from (RefLink[FinancialData, paclet:ref/FinancialData]):

FinancialData["EUR/USD"]

Quantity[3,"IndianRupees"]+Quantity[1400,"KoreanWon"]

%/.{"KRW/USD"->.009,"INR/USD"->.018}