On top comes the largest economy in the world with a GDP of USD 29.17 trillion. Following the US is the biggest developing economy with a total GDP of 18.27 trillion, as per the IMF. Up next is the European growth engine, Germany. Germany has a total GDP of USD 4.71 trillion. After Germany, we are back in Asia. Japan has slipped in the rankings, slumping to number 4 with a GDP of USD 4.07 trillion. Then there is the sub-continental giant, India. The most populous country has a GDP of USD 3.89 trillion. Former colonial power, the United Kingdom. The UK has a GDP of USD 3.59 trillion. At number 7 is another former empire. France has a total GDP of USD 3.17 trillion.