Budapest
525 km²
Hanoi
3,359 km²
Hungary
Vietnam
Area Comparison
Budapest is 6.4x smaller than Hanoi
Population Comparison
Budapest has 4.8x fewer people than Hanoi
Hanoi is significantly larger, covering 6.4 times the area of Budapest. Hanoi spans 3,359 km² (1,297 mi²) while Budapest covers 525 km² (203 mi²) — a difference of 2,834 km². You could fit Budapest inside Hanoi approximately 6 times.
To put Budapest's size in perspective, its area of 525 km² is about 1.2x smaller than Seoul. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
In more relatable units, Budapest's 525 km² is about 74,000 American football fields, 150 times the area of Central Park, or 9 times the area of Manhattan. For Hanoi, that's about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris.
Budapest is the capital and most populous city of Hungary. It is Hungary's primate city with 1.7 million inhabitants and its greater metro area has a population of about 3.3 million, representing one-third of the country's population and producing above 40% of the country's economic output. Budapest is the political, economic, and cultural center of the country, among the ten largest cities in the European Union and the second largest urban area in Central and Eastern Europe.
Known as "Pearl of the Danube", Budapest covers 525 km² with a population of 1.7 million. The city was established in 1873. Budapest is known for Buda Castle, Hungarian Parliament Building, Chain Bridge, among other attractions.
Budapest's metro area holds about 3.3 million people, roughly one-third of Hungary's entire population.
Hanoi is the capital and second-most populous municipality of Vietnam. It encompasses an area of 3,358.6 km2 (1,296.8 mi2), and as of 2025 has a population of 8,807,523. Hanoi had the second-highest gross regional domestic product of all Vietnamese provinces and municipalities at US$48 billion in 2023, behind Ho Chi Minh City. It hosts 78 foreign embassies, the headquarters of the Vietnam People's Army (VPA), its Vietnam National University system, and other governmental organizations.
Also known as "City Between Rivers", Hanoi has an area of 3,359 km² and is home to 8.1 million people. Its history stretches back to 1010. Visitors come for Hoan Kiem Lake, Old Quarter, Temple of Literature, and much more. Getting around is easy with the Hanoi Metro.
Hanoi encompasses 3,358.6 square kilometers and had a population of nearly 8.8 million as of 2025.
Budapest has a population density of 3,219 people per km² — a moderately dense city. Hanoi, with 2,397 people per km², is a moderately dense city. Both cities have comparable density, though Budapest is slightly more compact.
Size Ratio
Budapest fits inside Hanoi ~6 times
Density Gap
Budapest is 1.3x more densely populated
History
Hanoi is ~863 years older
Budapest covers 525 km². Cities with a similar urban footprint include Warsaw (517 km²), Montreal (498 km²), Prague (496 km²), Auckland (559 km²), or Mumbai (603 km²).
Hanoi covers 3,359 km². Cities with a similar urban footprint include Karachi (3,527 km²), Cairo (3,085 km²), Dubai (4,114 km²), Lima (2,672 km²), or Moscow (2,511 km²).
The straight-line distance from Budapest to Hanoi is 8,067 km (5,013 miles), with an estimated flight time of ~9h 59m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.