The Wealth of Nations: How to Measure and Compare Country Wealth

How rich is a country? The answer depends on what you measure. A nation’s yearly output, the income its residents earn, the assets it has built up, and the living standards of its people are four different things, and each ranking tells a different story. This guide explains the main measures, what each one captures and misses, and then compares the world’s largest economies using official data.

$30.8T
US GDP, 2025 (largest at market rates)
$41.3T
China GDP at PPP, 2025 (largest at PPP)
$163k
Singapore GDP per capita PPP, 2025 (highest with 2025 data)
$3.75T
China reserves incl. gold, 2025 (largest)

Figures: World Bank WDI, World Bank WDI, World Bank WDI, World Bank WDI (data retrieved October 12, 2026). Small territories such as Monaco, Liechtenstein and Bermuda, whose latest data is for 2024, are left out of the per-capita chart.

Flow versus stock: income is not wealth

Economists separate flows from stocks. GDP and GNI are flows: what an economy produces or earns in one year. Wealth is a stock: the value of everything a nation owns at a point in time, including factories, roads, land, minerals, skills and financial claims on the rest of the world. A country can have high income but deplete its assets, or hold large assets but earn little from them. A full picture needs both.

The main measures

GDP (market exchange rates)

Value of all final goods and services produced inside a country in a year, converted to US dollars at market rates.

Strength: best measure of economic weight in world markets, such as buying imports, weapons or foreign assets. Limit: swings with exchange rates and ignores price differences between countries.

GDP at purchasing power parity (PPP)

GDP converted with PPP rates from the World Bank’s International Comparison Program, which adjust for what money actually buys locally.

Strength: better for comparing domestic output and living standards. Limit: based on periodic price surveys and less useful for internationally traded goods.

GDP per capita

GDP divided by population. It shows average output per person, not what a typical person receives.

Strength: simple and widely available. Limit: hides inequality, and is inflated in small financial centers and tax hubs.

GNI (Gross National Income)

GDP plus income residents earn abroad, minus income paid to foreigners. The World Bank uses GNI per capita (Atlas method) to classify countries by income level.

Strength: closer to what residents actually earn. Limit: still distorted where multinational profits are booked; Ireland’s statistics office publishes a modified GNI (GNI*) for this reason.

Household wealth per adult

Net worth (financial plus non-financial assets minus debts) of households, estimated by the UBS Global Wealth Report and by national accounts in OECD countries.

Strength: the median shows the typical adult; the mean shows the average. A big gap between them signals concentrated wealth. Limit: these are modelled estimates, weakest where data on top fortunes are scarce.

Comprehensive wealth

The World Bank’s Changing Wealth of Nations accounts value produced capital (buildings, machines, infrastructure), natural capital (land, forests, fisheries, energy, minerals), human capital (the value of people’s future earnings) and net foreign assets.

Strength: shows whether growth is sustainable. Limit: relies on many assumptions; latest published year is 2020.

Reserves and sovereign wealth funds

Foreign exchange reserves (including gold) are held by central banks; sovereign wealth funds, such as Norway’s Government Pension Fund Global, invest state savings, often from oil and gas.

Strength: measures a state’s financial firepower and crisis buffers. Limit: says little about the wealth of ordinary citizens.

Debt and net international investment position

Public debt and the net international investment position (NIIP: a country’s foreign assets minus its foreign liabilities, tracked under IMF standards) show what a nation owes.

Strength: reveals vulnerabilities that output figures hide. Limit: a large debtor can still be very rich if it borrows in its own currency, as the United States does.

Human Development Index (HDI)

The UNDP’s composite of health (life expectancy), education (years of schooling) and income (GNI per capita, PPP), scored from 0 to 1.

Strength: captures well-being beyond money. Limit: averages hide inequality; UNDP also publishes an inequality-adjusted HDI for that reason.

The 15 largest economies compared

Ranked by GDP at market exchange rates, 2025. The United States leads. China’s economy is about 63% of the US size at market rates, but about 1.34 times the US size at PPP, because prices in China are lower. India’s PPP GDP is about 4.3 times its market-rate GDP, the largest gap in this group.

GDP at market exchange rates, 2025United States$30.8TChina$19.5TGermany$5.1TJapan$4.4TUnited Kingdom$4.0TIndia$4.0TFrance$3.4TRussia$2.6TItaly$2.6TCanada$2.3TBrazil$2.3TSpain$1.9TSouth Korea$1.9TMexico$1.8TAustralia$1.8TCurrent US$, trillions. Source: World Bank WDI (NY.GDP.MKTP.CD), 2025.
Chart 1. GDP, current US$, 2025. Source: World Bank WDI.
GDP at purchasing power parity, 2025China$41.3TUnited States$30.8TIndia$17.2TRussia$7.2TJapan$6.8TGermany$6.3TBrazil$5.0TUnited Kingdom$4.5TFrance$4.4TItaly$3.7TMexico$3.4TSouth Korea$3.3TSpain$3.0TCanada$2.8TAustralia$2.0TCurrent international $, trillions. Source: World Bank WDI (NY.GDP.MKTP.PP.CD), 2025.
Chart 2. The same 15 economies ranked by GDP at PPP, 2025. Source: World Bank WDI.
#CountryGDP (US$)GDP (PPP)GDP per capitaGDP per capita (PPP)GNI per capita (Atlas)HDI 2023
1United States$30.8T$30.8T$90,027$90,027$88,8100.938
2China$19.5T$41.3T$13,862$29,333$14,2300.797
3Germany$5.1T$6.3T$60,496$75,407$60,2000.959
4Japan$4.4T$6.8T$35,951$55,422$38,3400.925
5United Kingdom$4.0T$4.5T$57,602$64,606$54,5500.946
6India$4.0T$17.2T$2,702$11,748$2,7600.685
7France$3.4T$4.4T$48,986$63,975$48,6300.92
8Russia$2.6T$7.2T$17,547$49,568$15,9600.832
9Italy$2.6T$3.7T$43,309$62,803$42,0800.915
10Canada$2.3T$2.8T$55,698$66,746$56,4200.939
11Brazil$2.3T$5.0T$10,713$23,433$10,5500.786
12Spain$1.9T$3.0T$38,627$59,868$37,1200.918
13South Korea$1.9T$3.3T$36,227$63,125$37,8800.937
14Mexico$1.8T$3.4T$13,889$25,868$13,7300.789
15Australia$1.8T$2.0T$65,130$71,934$64,1200.958

Sources: World Bank WDI, World Bank WDI, World Bank WDI, World Bank WDI (2025 unless noted); HDI from UNDP HDR 2025 (2023 values). T = trillion.

Who is richest per person?

Per-person rankings are led by small, open economies: financial centers, energy exporters and hosts of multinational headquarters. Some of these figures overstate local living standards. Ireland’s GDP per capita in 2025 was $131,592 at market rates, compared with GNI per capita (Atlas method) of $87,360, partly because of profits booked there by multinational firms.

GDP per capita PPP leaders, 2025Singapore$163kLuxembourg$157kIreland$155kMacao SAR, China$137kQatar$129kNorway$104kSwitzerland$103kGuyana$98kBrunei Darussalam$92kUnited States$90kNetherlands$87kIceland$83kCurrent international $ per person. Economies with 2025 data only. Source: World Bank WDI (NY.GDP.PCAP.PP.CD).
Chart 3. Highest GDP per capita at PPP among economies with 2025 data. Source: World Bank WDI.

Does money buy development?

Higher income per person generally comes with higher human development, but the link flattens at the top. Countries with similar incomes can differ in health and education outcomes.

GDP per capita (PPP, 2025) vs HDI (2023)$0k$20k$40k$60k$80k$100k0.60.70.80.91.0USACHNDEUJPNGBRINDFRARUSITACANBRAESPKORMEXAUSGDP per capita, PPP (international $, 2025)HDI (2023)
Chart 4. GDP per capita at PPP (2025, World Bank WDI) against HDI (2023, UNDP HDR 2025) for the 15 largest economies. Labels are ISO country codes. The years differ because the latest HDI is for 2023.

What nations are made of: the capital mix

In the World Bank’s comprehensive wealth accounts, people are the largest asset in most economies. Human capital made up about 67% of US comprehensive wealth in 2020. Energy exporters such as Saudi Arabia and Norway hold large net foreign assets, built partly through state investment funds, while the United States and India had net foreign liabilities.

Composition of comprehensive wealth, 2020United StatesHuman capital: 63%63%Produced capital: 36%36%Natural capital: 1%ChinaHuman capital: 61%61%Produced capital: 24%24%Natural capital: 13%13%Net foreign assets: 2%GermanyHuman capital: 60%60%Produced capital: 34%34%Natural capital: 1%Net foreign assets: 5%IndiaHuman capital: 59%59%Produced capital: 9%9%Natural capital: 32%32%NorwayHuman capital: 43%43%Produced capital: 34%34%Natural capital: 4%Net foreign assets: 18%18%Saudi ArabiaHuman capital: 55%55%Produced capital: 16%16%Natural capital: 3%Net foreign assets: 27%27%Human capitalProduced capitalNatural capitalNet foreign assetsShare of positive wealth components. Negative net foreign assets (USA, India) not drawn.
Chart 5. Composition of comprehensive wealth, 2020, real chained 2019 US$. Source: World Bank, Changing Wealth of Nations (World Bank Data360/WDI wealth accounts, source 59).
CountryTotal wealthHumanProducedNaturalNet foreign assets
United States$249.2T67%38%1%−$15.0T
China$116.7T61%24%13%$2.1T
Germany$49.7T60%34%1%$2.5T
India$22.2T61%9%33%−$0.8T
Norway$6.2T43%34%4%$1.1T
Saudi Arabia$4.1T54%16%3%$1.1T

Shares are of total comprehensive wealth. Natural capital = renewable plus non-renewable. 2020, real chained 2019 US$. Source: World Bank, Changing Wealth of Nations. The 2020 nonrenewable values reflect that year’s low energy prices.

Financial firepower: reserves

Official reserves show how much foreign currency and gold a state can deploy to defend its currency or pay for imports in a crisis. China’s reserves are the largest in the world by a wide margin.

Total reserves including goldChina$3,749BUnited States$1,385BJapan$1,371BSwitzerland$1,076BIndia$700BRussia*$608BGermany$572BSaudi Arabia$505BSouth Korea$437BItaly$434BCurrent US$, billions, 2025 (*2024). Source: World Bank WDI (FI.RES.TOTL.CD).
Chart 6. Ten largest holders of total reserves including gold. Source: World Bank WDI.

How to read wealth rankings

  • For power and global reach: look at GDP at market rates, reserves and sovereign funds.
  • For the size of the domestic economy: look at GDP at PPP.
  • For living standards: look at GNI per capita at PPP, median household wealth and HDI together.
  • For sustainability: look at comprehensive wealth. Are natural and human assets growing or being run down?
  • For vulnerability: look at debt and the net international investment position.

Economic weight is only one source of national power. See how it fits with military, technology and other factors in The Seven Lenses of Geopolitical Power, how trade fights are analysed in the Trade Lenses framework, the agreements tracked in our Geopolitical Deals Hub, and more analysis on Geopolitics and global trade metrics.

Method and source notes

GDP, GNI, reserves: World Bank World Development Indicators via the World Bank API, most recent value per country (2025 for most countries; Russia’s reserves are for 2024). Indicators: NY.GDP.MKTP.CD, NY.GDP.MKTP.PP.CD, NY.GDP.PCAP.CD, NY.GDP.PCAP.PP.CD, NY.GNP.PCAP.CD (Atlas method), FI.RES.TOTL.CD. Values are revised regularly, and IMF World Economic Outlook figures can differ slightly.

HDI: UNDP Human Development Report 2025 composite indices time series; latest year 2023.

Comprehensive wealth: World Bank Changing Wealth of Nations wealth accounts (WDI source 59), year 2020, real chained 2019 US$. Total = human + produced + renewable natural + nonrenewable natural capital + foreign assets − foreign liabilities. The components are estimates built on modelling assumptions.

Household wealth: Discussed conceptually; see the UBS Global Wealth Report and OECD Wealth Distribution Database for country estimates. Individual figures are not reproduced here.

Rankings exclude regional and income-group aggregates. Per-capita leaders are limited to economies with 2025 data.