San Diego
964 km²
Xi'an
10,097 km²
United States
People's Republic of China
Area Comparison
San Diego is 10.5x smaller than Xi'an
Population Comparison
San Diego has 9.3x fewer people than Xi'an
In terms of area, Xi'an is 10.5x the size of San Diego. Xi'an spans 10,097 km² (3,898 mi²) while San Diego covers 964 km² (372 mi²) — a difference of 9,133 km². You could fit San Diego inside Xi'an approximately 10 times.
To put San Diego's size in perspective, its area of 964 km² is roughly the same size as Berlin. Meanwhile, Xi'an at 10,097 km² is about 1.6x the size of Shanghai.
San Diego's footprint is roughly about 135,000 American football fields, 16 times the area of Manhattan, or 9 times the area of Paris — pick whichever unit feels intuitive. Xi'an works out to about 1,400,000 American football fields, 170 times the area of Manhattan, or 96 times the area of Paris.
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.
Known as "America's Finest City", San Diego covers 964 km² with a population of 1.4 million. The city was established in 1769. San Diego is known for San Diego Zoo, Balboa Park, Coronado Beach, among other attractions.
San Diego sits directly on the Mexico-United States border, making it California's southwesternmost major city.
Xi'an is the capital of the Chinese province of Shaanxi. A sub-provincial city on the Guanzhong plain, the city is the third-most populous city in Western China after Chongqing and Chengdu, as well as the most populous city in Northwestern China. Its total population was 12.95 million in the 2020 census, including an urban population of 9.28 million.
Nicknamed "Ancient Capital", Xi'an has an area of 10,097 km² and is home to 12.9 million people. Visitors come for Terracotta Army, Xi'an City Wall, Big Wild Goose Pagoda, and much more.
Xi'an's 2020 census recorded 12.95 million residents, making it the most populous city in Northwestern China.
San Diego has a population density of 1,442 people per km² — a relatively spread-out city. Xi'an, with 1,283 people per km², is a relatively spread-out city. Both cities have comparable density, though San Diego is slightly more compact.
Size Ratio
San Diego fits inside Xi'an ~10 times
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).
Xi'an covers 10,097 km². Cities with a similar urban footprint include Melbourne (9,993 km²), Wuhan (8,569 km²), Sydney (12,368 km²), Guangzhou (7,434 km²), or Chengdu (14,378 km²).
The straight-line distance from San Diego to Xi'an is 11,147 km (6,926 miles), with an estimated flight time of ~13h 37m.
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