Use the Big Mac Index to compare currency valuations worldwide. Calculate the implied exchange rate and see if a currency is over- or undervalued.
The Big Mac Index, invented by The Economist in 1986, is a lighthearted but surprisingly useful way to gauge whether a currency is fairly valued. Because a Big Mac is made with the same ingredients everywhere, its price in different countries reflects local purchasing power.
This calculator computes the implied exchange rate based on Big Mac prices in two countries and compares it to the actual market rate. If the implied rate is higher than the actual rate, the foreign currency appears undervalued (and your travel dollar goes further). If lower, it's overvalued (and the destination is relatively expensive).
While not a rigorous economic model, the Big Mac Index gives travelers a quick, intuitive check on whether a country's prices feel cheap or expensive relative to home — and it's much more fun than reading academic papers on purchasing power parity. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation.
The Big Mac Index offers an instant, relatable gauge of how far your money goes abroad. It's a practical shortcut for travelers choosing between destinations or setting daily budgets. If a Big Mac costs half as much as at home, most other everyday items will be similarly cheap. Having a precise figure at your fingertips empowers better planning and more confident decisions.
Implied Rate = Local Big Mac Price / Home Big Mac Price Valuation = ((Implied Rate − Actual Rate) / Actual Rate) × 100 Negative valuation = undervalued (cheaper for you) Positive valuation = overvalued (more expensive for you)
Result: Implied rate: 13.18, Currency undervalued by 24.7%
A Big Mac in the US costs $5.69 and in Mexico costs 75 pesos. The implied rate is 75 / 5.69 = 13.18 pesos per dollar, but the actual rate is 17.5. The peso appears undervalued by (13.18 − 17.5) / 17.5 = −24.7%, meaning Mexico is about 25% cheaper than the exchange rate alone suggests.
The Economist introduced the Big Mac Index in September 1986 as a tongue-in-cheek guide to whether currencies are at their "correct" level. It was never intended as a precise gauge of exchange rates, yet it has become one of the most cited economic indicators in mainstream media because of its simplicity and relatability.
Check The Economist's latest Big Mac data before choosing a destination. Countries with the most undervalued currencies relative to the dollar tend to offer the best travel value. Combine this with flight cost data to find destinations that are both cheap to reach and cheap once you arrive.
Similar indices exist for other standardized products: the Starbucks Tall Latte Index, the KFC bucket index, and the IKEA Billy Bookcase Index. Each offers a slightly different angle on purchasing power and can be more relevant for countries without McDonald's.
Created by The Economist magazine in 1986, the Big Mac Index compares the price of a McDonald's Big Mac across countries to assess whether currencies are at their "correct" exchange rate according to purchasing power parity theory. It has since become one of the most widely cited informal economic indicators in the world.
PPP is the economic theory that exchange rates should adjust so that an identical basket of goods costs the same in every country. The Big Mac serves as a simple one-item basket.
It has some predictive power over the long term. Studies show that heavily undervalued currencies tend to strengthen over time and overvalued ones weaken, though other factors like interest rates and politics dominate in the short run.
It's available in over 120 countries and includes a consistent set of inputs: beef, bread, lettuce, cheese, labor, rent, and taxes. This makes it a surprisingly comprehensive proxy for local costs.
As of recent data, countries like India, Egypt, South Africa, and Indonesia consistently show the most undervalued currencies, meaning travelers get the most for their money. These destinations offer strong purchasing power for visitors from the US, EU, and other developed economies.
Big Mac prices are affected by local factors like beef availability (expensive in India), rent (high in city centers), and government subsidies. It's a fun approximation, not a scientific measurement.