Usually, the US dollar is used as the basis. Based on his testimony, it is possible to determine how undervalued one currency is in relation to another. The Big Mac index in simple words is the ratio of exchange rates expressed in terms of the cost of the burgers of the same name. Because (according to this theory, and not in reality) apples have the same value both in Germany and in the USA.
Therefore, the exchange rate is 0.5 dollars per Euro. For example, if an apple costs 2 Euros in Germany, and 1 dollar in the USA, then 2 Euros are worth 1 dollar. Purchasing power parity is a theory according to which currencies of different countries need to be compared by how much money is required to pay for the same product in different countries. This helps to determine a "fair" exchange rate based on purchasing power. This indicator shows how many world-famous burgers can be bought for the same price in different countries.
In other words, it shows the ratio of exchange rates of different countries in terms of Big Macs. The Big Mac Index is a variant of determining purchasing power parity (PPP) expressed in terms of the price of a burger. This indicator is not among the official ones, but it is known almost all over the world. Below you will find out what this indicator is, on the basis of which it is calculated and what practical significance it has, as well as see examples of similar indices. For more than 30 years, The Economist magazine has been calculating the Big Mac Index.