What Is GDP by Purchasing Power Parity?
TL;DR: GDP by Purchasing Power Parity, usually written GDP (PPP), is a country total economic output converted into international dollars using Purchasing Power Parity (PPP) conversion factors instead of market exchange rates. It measures what a country output actually buys at local prices. Nominal GDP measures what that output would be worth if exchanged on currency markets. The two give different rankings because exchange rates and local price levels do not move together.
The problem GDP (PPP) solves
Gross Domestic Product is measured first in a country own currency. To compare two countries, those figures have to be converted into a shared unit. The obvious way is the market exchange rate, and that gives nominal GDP.
The problem is that exchange rates move for reasons that have little to do with what things cost locally. Interest-rate decisions, capital flows, and speculation all push a currency around while the price of rent, food, and services at home stays roughly where it was. Convert at the exchange rate and you learn what a country output is worth on international markets. You do not learn what it buys for the people living there.
GDP (PPP) converts using a PPP conversion factor instead, which is derived from surveyed local prices. This is the same logic the PPP Salary Calculator applies to an individual salary, scaled up from one person to an entire economy.
Nominal GDP, GDP (PPP), and GDP (PPP) per capita
| Measure | What it is | Strength | Limitation |
|---|---|---|---|
| GDP (nominal) | Total output converted to US dollars at the market exchange rate on a given day. | Reflects real buying power on world markets, for imports, debt, and trade. | Moves with currency speculation and interest rates, not with local prices. |
| GDP (PPP) | Total output converted using each country PPP conversion factor instead. | Reflects what the output actually buys inside the country. | Relies on price surveys that are run only every few years, then extrapolated. |
| GDP (PPP) per capita | The same PPP-converted output, divided by population. | The closest single number to average material living standards. | An average, so it hides distribution and inequality entirely. |
How the conversion actually works
A PPP conversion factor is the number of units of local currency needed to buy what one international dollar buys in the United States. To get GDP (PPP), a country GDP in its own currency is divided by that factor.
For example, India PPP conversion factor is 19.84 INR per international dollar (2025 data), against 1.00 for the United States, whose factor is the reference point. Dividing India GDP in rupees by 19.84 rather than by the market exchange rate is what produces its GDP (PPP) figure, and it is why India ranks higher on GDP (PPP) than on nominal GDP.
These are the live conversion factors this site uses, straight from the World Bank, most recently refreshed on August 28, 2026:
| Country | Currency | PPP factor | Data year |
|---|---|---|---|
| India | INR | 19.84 | 2025 |
| Japan | JPY | 103.34 | 2025 |
| Brazil | BRL | 2.58 | 2025 |
| Germany | EUR | 0.72 | 2025 |
| United States | USD | 1.00 | 2025 |
Source: World Bank PPP conversion factor, private consumption (PA.NUS.PRVT.PP). See our methodology for how this data is fetched, or all 184 countries.
Why the two rankings disagree
Countries where local prices are low relative to their exchange rate move up the table when you switch from nominal GDP to GDP (PPP). Countries with high domestic price levels move down. Neither ranking is wrong. They answer different questions.
Nominal GDP is the better measure for anything transacted internationally, such as import bills, foreign-currency debt, or the size of a market to sell into. GDP (PPP) is the better measure for anything about domestic living standards or the real volume of goods and services an economy produces. For a fuller treatment of how the two concepts relate, see PPP vs GDP.
Where to find the data
The World Bank publishes GDP (PPP) as indicator NY.GDP.MKTP.PP.CD, and GDP (PPP) per capita as NY.GDP.PCAP.PP.CD. Both are built on the same International Comparison Program price surveys that produce the conversion factors above. The IMF publishes its own PPP-based GDP series in the World Economic Outlook, which is largely extrapolated rather than freshly surveyed, and the two sources do not always agree. We explain that gap in World Bank vs IMF PPP data.
This site does not republish GDP totals. It holds the 184 PPP conversion factors (2025 is the most recent year for most countries) and uses them to convert individual salaries rather than national output.
Frequently asked questions
What does GDP (PPP) mean?
GDP (PPP) means a country total economic output converted into international dollars using Purchasing Power Parity conversion factors rather than market exchange rates. It answers what a country output can actually buy at local prices, instead of what it would be worth if exchanged on currency markets. The World Bank publishes it as the indicator NY.GDP.MKTP.PP.CD.
Which countries rank higher by GDP (PPP) than by nominal GDP?
Countries where local prices are low relative to their exchange rate generally rank higher on GDP (PPP) than on nominal GDP, because a given amount of local currency buys more at home than the exchange rate implies. Countries with high domestic price levels tend to move the other way. The direction of the shift for any country is determined by its PPP conversion factor relative to its market exchange rate, both of which are published data rather than estimates.
Is GDP (PPP) per capita the same as GDP (PPP)?
No. GDP (PPP) is a national total, so large populous countries rank highly simply because they are large. GDP (PPP) per capita divides that total by population and is the figure normally used to compare living standards between countries. A country can rank in the top five by GDP (PPP) and well outside the top fifty by GDP (PPP) per capita.
Where does GDP (PPP) data come from?
GDP (PPP) figures come from the World Bank International Comparison Program, which surveys prices for a comparable basket of goods and services across participating countries and derives a PPP conversion factor for each currency. National statistical offices supply the underlying GDP figures. The IMF also publishes PPP-based GDP in its World Economic Outlook, using largely extrapolated rather than freshly surveyed data.