Chennai
427 km²
Hanoi
3,359 km²
City Map Compare/Chennai vs Hanoivs
vs
5 km
India
Vietnam
Area Comparison
Chennai is 7.9x smaller than Hanoi
Population Comparison
Chennai has 1.2x fewer people than Hanoi
Hanoi is significantly larger, covering 7.9 times the area of Chennai. Hanoi spans 3,359 km² (1,297 mi²) while Chennai covers 427 km² (165 mi²) — a difference of 2,932 km². You could fit Chennai inside Hanoi approximately 7 times.
To put Chennai's size in perspective, its area of 427 km² is about 1.4x smaller than Seoul. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
Picture Chennai another way: its area is large enough to fit about 60,000 American football fields, 130 times the area of Central Park, or 7 times the area of Manhattan. Hanoi, by comparison, equals about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris.
Chennai, also known as Madras, is the capital and largest city of Tamil Nadu, the southernmost state of India. It is located on the Coromandel Coast of the Bay of Bengal. As per the 2011 Indian census, Chennai is the sixth-most-populous city in India and forms the fourth-most-populous urban agglomeration. The city is coterminous with Chennai district, which together with the adjoining suburbs constitutes the Chennai Metropolitan Area, one of the largest metropolitan areas of India.
Known as "Madras", Chennai covers 427 km² with a population of 6.6 million. The city was established in 1639. Chennai is known for Marina Beach, Kapaleeshwarar Temple, Fort St. George, among other attractions.
Chennai, formerly Madras, is the capital of Tamil Nadu and the sixth-most-populous city in India.
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. The city dates 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.
Chennai has a population density of 15,457 people per km² — an extremely dense urban environment. Hanoi, with 2,397 people per km², is a moderately dense city. Chennai is dramatically more crowded, with 6.4x the population density.
Size Ratio
Chennai fits inside Hanoi ~7 times
Density Gap
Chennai is 6.4x more densely populated
History
Hanoi is ~629 years older
Chennai covers 427 km². Cities with a similar urban footprint include Vienna (415 km²), Oslo (454 km²), Denver (401 km²), Portland (376 km²), or Philadelphia (370 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 Chennai to Hanoi is 2,853 km (1,772 miles), with an estimated flight time of ~3h 51m.
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