What Is the Big Mac Index? Burgernomics Explained
In 1986 The Economist invented one of the most delicious tools in economics: the Big Mac Index. The idea is beautifully simple — a McDonald’s Big Mac is made from roughly the same ingredients everywhere, so it should cost about the same in every country once you convert the price into a single currency. When it doesn’t, a currency may be over- or under-valued.
The theory behind the burger
The index is a tasty way to explain purchasing power parity (PPP) — the theory that exchange rates should eventually move so that identical goods cost the same everywhere. If a Big Mac costs $5.69 in the United States but only the equivalent of $2.80 in India, the Indian rupee looks “undervalued” against the dollar by that measure: your dollar buys more burger there.
Why it caught on
Economists loved it because it made an abstract idea concrete. You don’t need a spreadsheet to grasp that a burger costing twice as much in Switzerland tells you something about the Swiss franc. It’s not a precise trading signal — local wages, rent, taxes and beef prices all vary — but as a back-of-the-napkin gauge of whether a currency is cheap or expensive, it’s stood the test of time for nearly four decades.
How we take it further
Our Burgernomics tool borrows the spirit of the Big Mac Index and expands it. Instead of one burger, we compare a whole basket of everyday items between any two countries — groceries, a Netflix subscription, a litre of petrol, rent, even a new car — using real, sourced local prices converted at today’s live exchange rate. It’s the Big Mac Index, grown up and gone shopping.
So next time you wonder whether your money would stretch further abroad, remember: sometimes the best economic indicator comes with fries.