According to the Big Macka Index, the current exchange rate of the Polish currency is undervalued by 30%. This undervaluation would have been greater if the price of a sandwich in Poland had not increased by a record 18 percent in the last six months.

In 1986, The Economist published the Big Mac Index for the first time in its pages as an illustration of the purchasing power parity of money in various countries of the world against the US dollar.