Wanderlust World Wanderlust World Australia's vast landmass often sparks curiosity about how it compares to other nations. A striking fact: you could fit approximately 31 United Kingdoms within Australia's borders. Australia spans about 7.69 million square kilometers, while the United Kingdom covers roughly 243,600 square kilometers. This comparison highlights the sheer scale of the Australian continent, which is both a country and a continent in its own right.