Hangzhou
16,854 km²
Philadelphia
370 km²
People's Republic of China
United States
Area Comparison
Hangzhou is 45.6x larger than Philadelphia
Population Comparison
Hangzhou has 7.5x more people than Philadelphia
In terms of area, Hangzhou is 45.6x the size of Philadelphia. Hangzhou spans 16,854 km² (6,507 mi²) while Philadelphia covers 370 km² (143 mi²) — a difference of 16,484 km². You could fit Philadelphia inside Hangzhou approximately 45 times.
To put Hangzhou's size in perspective, its area of 16,854 km² is about 2.7x the size of Shanghai. Meanwhile, Philadelphia at 370 km² is about 1.6x smaller than Seoul.
Picture Hangzhou another way: its area is large enough to fit about 2,400,000 American football fields, 160 times the area of Paris, or 140 times the area of San Francisco. For Philadelphia, that's about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Hangzhou is the capital city and most populous city of Zhejiang province, China, situated at the intersection of the southern terminus of the Grand Canal and the head of Hangzhou Bay. Renowned as one of the Eight Ancient Capitals of China, Hangzhou is celebrated for its cultural heritage and its West Lake, a UNESCO World Heritage site.
Known as "Paradise on Earth", Hangzhou covers 16,854 km² with a population of 11.9 million. Hangzhou is known for West Lake, Grand Canal terminus, Lingyin Temple, among other attractions.
Hangzhou's West Lake is a UNESCO World Heritage site, drawing visitors to its celebrated cultural landscape.
Philadelphia, colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania, and the sixth-most populous city in the United States, with a Census-estimated population of 1,574,281 in July 2025. The Philadelphia metropolitan area has 6.33 million residents and is the nation's ninth-largest metropolitan area. Philadelphia is known for its culture, cuisine, and history, maintaining contemporary influence in business and technology, sports, and music.
Often called "Philly", Philadelphia has an area of 370 km² and is home to 1.6 million people. Its history stretches back to 1682. Visitors come for Liberty Bell, Independence Hall, Philly Cheesesteak, and much more.
Philadelphia is the sixth-most populous US city, with an estimated 1,574,281 residents as of July 2025.
Hangzhou has a population density of 708 people per km² — a relatively spread-out city. Philadelphia, with 4,324 people per km², is a moderately dense city. Philadelphia is dramatically more crowded, with 6.1x the population density.
Size Ratio
Philadelphia fits inside Hangzhou ~45 times
Density Gap
Philadelphia is 6.1x more densely populated
Hangzhou covers 16,854 km². Cities with a similar urban footprint include Beijing (16,411 km²), Brisbane (15,826 km²), Chengdu (14,378 km²), Sydney (12,368 km²), or Xi'an (10,097 km²).
Philadelphia covers 370 km². Cities with a similar urban footprint include Seattle (369 km²), Dhaka (368 km²), Portland (376 km²), Atlanta (348 km²), or Denver (401 km²).
The straight-line distance from Hangzhou to Philadelphia is 12,048 km (7,487 miles), with an estimated flight time of ~14h 40m.
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