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Thailand
USA
Area Comparison
Bangkok is 13.0x larger than San Francisco
Population Comparison
Bangkok has 12.1x more people than San Francisco
In terms of area, Bangkok is 13.0x the size of San Francisco. Bangkok spans 1,569 km² (606 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 1,448 km². You could fit San Francisco inside Bangkok approximately 12 times.
To put Bangkok's size in perspective, its area of 1,569 km² is roughly the same size as London. Meanwhile, San Francisco at 121 km² is about 1.2x the size of Paris (city proper).
Thailand's capital and largest city. Known as "City of Angels", Bangkok covers 1,569 km² with a population of 10.5 million. The city was established in 1782. Bangkok is known for Grand Palace, Wat Arun, Floating markets, among other attractions. The city's main transit system is the BTS Skytrain & MRT.
Bangkok's full ceremonial name is 168 characters long, making it the longest city name in the world
A cultural and financial center in Northern California. Often called "SF", San Francisco has an area of 121 km² and is home to 0.9 million people. Its history stretches back to 1776. Visitors come for Golden Gate Bridge, Alcatraz Island, Cable cars, and much more. Getting around is easy with the BART & Muni.
San Francisco's 121 km² makes it one of the smallest major US cities by area
Looking beyond city limits, the Bangkok metropolitan area covers 7,762 km², which is 1.1x larger than greater San Francisco at 6,984 km². The Bangkok metro area is also more populous, with 16.2 million people compared to 4.7 million.
Bangkok has a population density of 6,718 people per km² — a densely populated city. San Francisco, with 7,190 people per km², is a densely populated city. Both cities have comparable density, though San Francisco is slightly more compact.
This comparison spans continents — Bangkok in Asia versus San Francisco in North America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Bangkok has a tropical savanna climate while San Francisco experiences Mediterranean conditions. Winters differ dramatically: Bangkok stays around 26°C while San Francisco drops to 10°C. When it's noon in Bangkok, it's midnight in San Francisco — a 15-hour time difference.
Size Ratio
San Francisco fits inside Bangkok ~12 times
Time Difference
15 hours apart
The straight-line distance from Bangkok to San Francisco is 12,745 km (7,919 miles), with an estimated flight time of ~15h 30m. See full distance details, including timezone difference and city facts.
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