On average in 2014, the Swiss franc held the most comparable value with American currency with an exchange rate of 0.952, states the Internal Revenue Service. Other comparable currencies include the Canadian dollar with an exchange rate of 1.149 and the Australian dollar with an exchange rate of 1.154.
Between 2009 and 2014, the currencies of Switzerland, Canada and Australia have maintained a comparable value to the U.S. dollar.
The Federal Reserve releases weekly reports of current exchange rates. As of Feb. 27, 2015, Swiss francs continued to be most comparable with an exchange rate of 0.9513. Individuals can search exchange rates using websites such as oanda.com, xe.com and x-rates.com, states the IRS.