Buenos Aires
203 km²
Perth
6,417 km²
Argentina
Australia
Area Comparison
Buenos Aires is 31.6x smaller than Perth
Population Comparison
Buenos Aires has 1.4x more people than Perth
Yes — Perth is 31.6x larger than Buenos Aires by area. Perth spans 6,417 km² (2,478 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 6,214 km². You could fit Buenos Aires inside Perth approximately 31 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Perth at 6,417 km² is roughly the same size as Shanghai.
Buenos Aires's footprint is roughly about 28,000 American football fields, 100 times the area of Monaco, or 60 times the area of Central Park — pick whichever unit feels intuitive. For Perth, that's about 899,000 American football fields, 110 times the area of Manhattan, or 61 times the area of Paris.
Buenos Aires, officially the Autonomous City of Buenos Aires, is the capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− global city, according to the GaWC 2024 ranking. The city proper has a population of 3.1 million and its urban area has a population of 16.7 million, making it the 21st most populous metropolitan area in the world.
Known as "Paris of South America", Buenos Aires covers 203 km² with a population of 3.1 million. The city was established in 1536. Buenos Aires is known for La Boca's Caminito, Recoleta Cemetery, Teatro Colón, among other attractions. The city's main transit system is the Buenos Aires Subte.
Buenos Aires is classified as an Alpha− global city according to the GaWC 2024 ranking.
Perth is the capital city of Western Australia. It is the fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth as of 2023. The world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp.
Nicknamed "City of Light", Perth has an area of 6,417 km² and is home to 2.1 million people. It was established in 1829. Visitors come for Swan River, Kings Park, Cottesloe Beach, and much more.
Perth is considered the world's most isolated major city by certain criteria, sitting on Australia's west coast.
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Perth, with 333 people per km², is a low-density, sprawling urban area. Buenos Aires is dramatically more crowded, with 45.3x the population density.
Size Ratio
Buenos Aires fits inside Perth ~31 times
Density Gap
Buenos Aires is 45.3x more densely populated
History
Buenos Aires is ~293 years older
Buenos Aires covers 203 km². Cities with a similar urban footprint include Helsinki (214 km²), Amsterdam (219 km²), Stockholm (188 km²), Osaka (225 km²), or Boston (232 km²).
Perth covers 6,417 km². Cities with a similar urban footprint include Shanghai (6,341 km²), Guangzhou (7,434 km²), Istanbul (5,461 km²), Wuhan (8,569 km²), or Melbourne (9,993 km²).
The straight-line distance from Buenos Aires to Perth is 12,590 km (7,823 miles), with an estimated flight time of ~15h 19m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.