Melbourne
9,993 km²
San Diego
964 km²
Australia
United States
Area Comparison
Melbourne is 10.4x larger than San Diego
Population Comparison
Melbourne has 3.7x more people than San Diego
In terms of area, Melbourne is 10.4x the size of San Diego. Melbourne spans 9,993 km² (3,858 mi²) while San Diego covers 964 km² (372 mi²) — a difference of 9,029 km². You could fit San Diego inside Melbourne approximately 10 times.
To put Melbourne's size in perspective, its area of 9,993 km² is about 1.6x the size of Shanghai. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
Picture Melbourne another way: its area is large enough to fit about 1,400,000 American football fields, 170 times the area of Manhattan, or 95 times the area of Paris. For San Diego, that's about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris.
Melbourne is the capital and most populous city of the Australian state of Victoria, and the second most-populous city in Australia. The city's name generally refers to a 9,993-square-kilometre (3,858 sq mi) area, comprising an urban agglomeration of 31 local government areas. The name is also used to specifically refer to the local government area named City of Melbourne, whose area is centred on the Melbourne central business district and some immediate surrounds.
Melbourne covers 9,993 km² with a population of 5.1 million. The city was established in 1835. Melbourne is known for Federation Square, Flinders Street Station, Melbourne Cricket Ground, among other attractions. The city's main transit system is the Melbourne Trams & Metro.
Melbourne's metropolitan area spans 9,993 square kilometers across 31 local government areas, making it Australia's second-most-populous city.
San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego metropolitan area with over 3.3 million residents is the 18th-largest metropolitan area in the country. San Diego is the county seat of San Diego County.
Often called "America's Finest City", San Diego has an area of 964 km² and is home to 1.4 million people. It was established in 1769. Visitors come for San Diego Zoo, Balboa Park, Coronado Beach, and much more.
San Diego sits directly on the Mexico-United States border, making it California's southwesternmost major city.
Melbourne has a population density of 508 people per km² — a relatively spread-out city. San Diego, with 1,442 people per km², is a relatively spread-out city. San Diego is noticeably denser, packing 2.8 times more people per square kilometer.
Size Ratio
San Diego fits inside Melbourne ~10 times
Density Gap
San Diego is 2.8x more densely populated
Melbourne covers 9,993 km². Cities with a similar urban footprint include Xi'an (10,097 km²), Wuhan (8,569 km²), Sydney (12,368 km²), Guangzhou (7,434 km²), or Chengdu (14,378 km²).
San Diego covers 964 km². Cities with a similar urban footprint include Abu Dhabi (972 km²), Dallas (997 km²), Berlin (892 km²), Santiago (838 km²), or Hong Kong (1,114 km²).
The straight-line distance from Melbourne to San Diego is 12,786 km (7,945 miles), with an estimated flight time of ~15h 33m.
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