The G-20 was founded in 1999 with the aim of studying, reviewing, and promoting high-level discussion of policy issues pertaining to the promotion of international financial stability. It seeks to address issues that go beyond the responsibilities of any one organization.

Collectively, the G-20 economies account for around 85% of the gross world product (GWP), 80% of world trade (or, if excluding EU intra-trade, 75%), and two-thirds of the world population. The G-20 heads of government or heads of state have periodically conferred at summits since their initial meeting in 2008.

Sl No. Country GDP Size (in Billion USD) as per 2010 GDP Per Capita (in USD) as per 2010 >PPP GDP (in Billion USD) as per 2010
1 Argentina 368.71 9123.74 644.30
2 Australia 889.60 44862.68 883.81
3 Brazil 2087.89 10710.07 2178.53
4 Canada 1574.05 46148.04 1334.14
5 China 5878.63 4392.61 10119.90
6 European Union 16250.33 32365.52 15203.15
7 France 3309.67 39459.55 2134.94
8 Germany 2560.00 40508.87 2944.35
9 India 1729.01 1476.60 4323.50
10 Indonesia 706.56 2945.58 1032.95
11 Italy 2051.41 33916.88 1778.83
12 Japan 5497.81 43136.86 4057.79
13 Mexico 1039.66 9166.23 1564.87
14 Russia 1479.82 10439.64 2230.95
15 Saudi Arabia 434.67 15835.94 623.11
16 South Africa 363.70 7275.34 525.81
17 South Korea 1014.48 20756.69 1466.13
18 Turkey 735.26 10106.39 968.60
19 United Kingdom 2246.08 36099.71 2181.46
20 United States 14582.40 47184.47 14526.55