Boston
232 km²
Shanghai
6,341 km²
USA
China
Area Comparison
Boston is 27.3x smaller than Shanghai
Population Comparison
Boston has 36.6x fewer people than Shanghai
Yes — Shanghai is 27.3x larger than Boston by area. Shanghai spans 6,341 km² (2,448 mi²) while Boston covers 232 km² (90 mi²) — a difference of 6,109 km². You could fit Boston inside Shanghai approximately 27 times.
To put Boston's size in perspective, its area of 232 km² is roughly the same size as Amsterdam. Meanwhile, Shanghai at 6,341 km² is about 1.5x the size of Los Angeles metro.
In more relatable units, Boston's 232 km² is about 32,000 American football fields, 110 times the area of Monaco, or 68 times the area of Central Park. For Shanghai, that's about 888,000 American football fields, 110 times the area of Manhattan, or 60 times the area of Paris.
Boston is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. Boston has an area of 48.4 sq mi (125 km2) and a population of 675,647 as of the 2020 census, making it the third-most populous city in the Northeastern United States after New York City and Philadelphia.
Known as "Beantown", Boston covers 232 km² with a population of 0.7 million. The city was established in 1630. Boston is known for Fenway Park, Freedom Trail, Harvard University, among other attractions. The city's main transit system is the MBTA (The T).
Boston covers just 125 km2 yet serves as the cultural and financial heart of all New England
Shanghai is a direct-administered municipality and the most populous urban area in China. It has a population of 29,558,908 in the urban area as of 2025. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the Huangpu River bisecting the city. Shanghai is a global center for finance, business and economics, research, science and technology, manufacturing, transportation, tourism, and culture. The Port of Shanghai is the world's busiest container port.
Nicknamed "Pearl of the Orient", Shanghai has an area of 6,341 km² and is home to 24.9 million people. The city dates back to 1291. Visitors come for The Bund, Oriental Pearl Tower, Shanghai Tower, and much more. Getting around is easy with the Shanghai Metro.
Shanghai's urban population reached 29.5 million in 2025, making it the most populous urban area in all of China.
Looking beyond city limits, the Boston metropolitan area covers 11,700 km², which is 1.8x larger than greater Shanghai at 6,341 km². The Shanghai metro area is also more populous, with 28.5 million people compared to 4.9 million.
Boston has a population density of 2,931 people per km² — a moderately dense city. Shanghai, with 3,922 people per km², is a moderately dense city. Both cities have comparable density, though Shanghai is slightly more compact.
This comparison spans continents — Boston in North America versus Shanghai in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Boston has a humid continental climate while Shanghai experiences humid subtropical conditions. When it's noon in Shanghai, it's midnight in Boston — a 13-hour time difference.
Size Ratio
Boston fits inside Shanghai ~27 times
Density Gap
Shanghai is 1.3x more densely populated
Time Difference
13 hours apart
History
Shanghai is ~339 years older
Boston covers 232 km². Cities with a similar urban footprint include Osaka (225 km²), Kuala Lumpur (243 km²), Amsterdam (219 km²), Helsinki (214 km²), or Edinburgh (259 km²).
Shanghai covers 6,341 km². Cities with a similar urban footprint include Perth (6,417 km²), Istanbul (5,461 km²), Guangzhou (7,434 km²), Wuhan (8,569 km²), or Dubai (4,114 km²).
The straight-line distance from Boston to Shanghai is 11,732 km (7,290 miles), with an estimated flight time of ~14h 18m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.