Calculus is a useful calculator that besides the usual converting functions (Temperature, Pressure, Speed etc.) handles currency-convertion. If used only to get x-rates from the Net, it is a freeware application. - Double display in conversion mode: it shows both the entity converting from (i.e., currency, degrees etc) and the entity converting to - Updating x-rates from the Net supported - Base-rates management for particular currencies supported - Auto-decimals management for particular currencies supported - Delta variation in currency calculation supported - Saving and printing functions available