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USA
Japan
Area Comparison
San Francisco is 18.1x smaller than Tokyo
Population Comparison
San Francisco has 16.0x fewer people than Tokyo
In terms of area, Tokyo is 18.1x the size of San Francisco. Tokyo spans 2,194 km² (847 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 2,073 km². You could fit San Francisco inside Tokyo approximately 18 times.
To put San Francisco's size in perspective, its area of 121 km² is about 1.2x the size of Paris (city proper). Meanwhile, Tokyo at 2,194 km² is about 1.1x smaller than Moscow.
A cultural and financial center in Northern California. Known as "SF", San Francisco covers 121 km² with a population of 0.9 million. The city was established in 1776. San Francisco is known for Golden Gate Bridge, Alcatraz Island, Cable cars, among other attractions. The city's main transit system is the BART & Muni.
San Francisco's 121 km² makes it one of the smallest major US cities by area
Japan's capital and the world's most populous metropolitan area. Often called "The Big Mikan", Tokyo has an area of 2,194 km² and is home to 14.0 million people. It was established in 1457. Visitors come for Shibuya Crossing, Tokyo Tower, Tsukiji Market, and much more. Getting around is easy with the Tokyo Metro & JR East.
Greater Tokyo is the world's largest metropolitan economy, surpassing the GDP of most countries
Looking beyond city limits, the Tokyo metropolitan area covers 13,572 km², which is 1.9x larger than greater San Francisco at 6,984 km². The Tokyo metro area is also more populous, with 37.4 million people compared to 4.7 million.
San Francisco has a population density of 7,190 people per km² — a densely populated city. Tokyo, with 6,363 people per km², is a densely populated city. Both cities have comparable density, though San Francisco is slightly more compact.
This comparison spans continents — San Francisco in North America versus Tokyo in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
San Francisco has a Mediterranean climate while Tokyo experiences humid subtropical conditions. Summers are notably different: Tokyo averages 27°C compared to 17°C in San Francisco. When it's noon in Tokyo, it's midnight in San Francisco — a 17-hour time difference.
Size Ratio
San Francisco fits inside Tokyo ~18 times
Time Difference
17 hours apart
History
Tokyo is ~319 years older
The straight-line distance from San Francisco to Tokyo is 8,275 km (5,142 miles), with an estimated flight time of ~10h 14m. See full distance details, including timezone difference and city facts.
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