As per International Monetary Fund (IMF) 2019 estimates, the GDP (nominal) of United Kingdom is USD 2,743,586 million. This GDP (nominal) is around 3.14% of Entire World’s GDP. Currently (2019), the world rank of United Kingdom is 6 in terms of GDP Nominal.
However, as per 2018 estimates by World Bank, the GDP (Nominal) of United Kingdom is USD 2,825,208 million. As per World Bank Estimates, the global rank of United Kingdom is 5.
On the other hand, as per 2019 estimates by International Monetary Fund, the GDP (PPP) of United Kingdom is USD 3,131,199 Million. This is 2.21% of World. United Kingdom on this basis has a global rank of 9.