Helsinki
214 km²
Philadelphia
370 km²
Finland
United States
Area Comparison
Helsinki is 1.7x smaller than Philadelphia
Population Comparison
Helsinki has 2.3x fewer people than Philadelphia
In terms of area, Philadelphia is 1.7x the size of Helsinki. Philadelphia spans 370 km² (143 mi²) while Helsinki covers 214 km² (83 mi²) — a difference of 156 km².
To put Helsinki's size in perspective, its area of 214 km² is roughly the same size as Amsterdam. Meanwhile, Philadelphia at 370 km² is about 1.6x smaller than Seoul.
Helsinki's footprint is roughly about 30,000 American football fields, 110 times the area of Monaco, or 63 times the area of Central Park — pick whichever unit feels intuitive. For Philadelphia, that's about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Helsinki is the capital and most populous city in Finland. It is on the shore of the Gulf of Finland and is the seat of southern Finland's Uusimaa region. About 694,000 people live in the municipality, with 1.3 million in the capital region and 1.6 million in the metropolitan area. As the most populous urban area in Finland, it is the country's most significant centre for politics, education, finance, culture, and research.
Known as "Daughter of the Baltic", Helsinki covers 214 km² with a population of 0.7 million. The city was established in 1550. Helsinki is known for Helsinki Cathedral, Suomenlinna fortress, Temppeliaukio Church, among other attractions.
Helsinki sits on the shore of the Gulf of Finland and serves as the capital of Finland's Uusimaa region.
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.
Helsinki has a population density of 3,224 people per km² — a moderately dense city. Philadelphia, with 4,324 people per km², is a moderately dense city. Both cities have comparable density, though Philadelphia is slightly more compact.
Density Gap
Philadelphia is 1.3x more densely populated
History
Helsinki is ~132 years older
Helsinki covers 214 km². Cities with a similar urban footprint include Amsterdam (219 km²), Osaka (225 km²), Buenos Aires (203 km²), Boston (232 km²), or Kuala Lumpur (243 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 Helsinki to Philadelphia is 6,744 km (4,190 miles), with an estimated flight time of ~8h 26m.
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