The data behind every number
Every figure in this article comes from one free, public source: the International Comparison Program (ICP), a global price survey coordinated by the World Bank. Once per cycle, statistical agencies in each participating country collect prices for hundreds of comparable goods and services. The ICP then converts those prices into purchasing power parities (PPPs) and price level indices (PLIs). The latest completed round covers 2021, and we pulled its figures straight from the World Bank's ICP 2021 database in September 2026.
A price level index is a simple idea with a technical name. It compares what things cost in a country, converted at the market exchange rate, with an average. A PLI of 150 means prices are 50% above the benchmark, and a PLI of 50 means they're half. The World Bank publishes PLIs with the world average set to 100. We rebased every value so that the US equals 100, which lets us read each index directly as "percent of American prices."
The formula
For each country, the $50 figure is:
$50 × (country's grocery price level ÷ US grocery price level)
The grocery measure we used is the ICP category called "food and non-alcoholic beverages," which covers what a typical cart holds, from bread and meat to coffee, juice and bottled water. For the US, that index was 116.5 in 2021 (world average = 100). Japan's was 191.2. So Japan sat at 164% of the US level, and a $50 American basket works out to about $82 there.
Here's the same result worked the long way, using Japan again. The ICP's food purchasing power parity for Japan was about 180 yen per dollar. The average market exchange rate in 2021 was about 110 yen per dollar. Dividing one by the other gives 1.64, the same 164% from a different direction. We ran that cross-check for every country, and each one matched.
How we chose the 20 countries
We didn't pick favorite destinations. The rule was mechanical: the 20 largest economies by household consumption spending in the ICP 2021 data, after the US itself. That gives China, Japan, Germany, India, the United Kingdom, France, Italy, Brazil, Canada, Mexico, Russia, South Korea, Spain, Australia, Indonesia, Türkiye, Poland, Egypt, the Netherlands and Switzerland. (Saudi Arabia was next in line.) Together they cover almost every continent and a very wide range of price levels.
A second opinion from Europe
As a check, we compared our results with the European Union's statistics office, which publishes its own food price levels for European countries. For the eight countries both sources cover, Eurostat's 2021 food price level indices put them in exactly the same order as our ICP-based figures: Switzerland, France, Italy, Germany, Spain, the Netherlands, Poland, Türkiye. Once both sets are expressed relative to one another, the levels land within about two points. That's reassuring, since the two systems are run by different teams.
The "$50 basket" is a translation of price levels, not a shopping cart that someone carried around the world. The ICP compares national average prices for goods that are comparable across countries and that matter in each country's spending. It does not price one identical list of products everywhere.