Size comparison

compared to

San Francisco is about 1,263 times bigger than Pentagon.

Pentagon is approximately 0.096 km² (0.037 sq mi), while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 126,205% larger than Pentagon.
Tip: This to-scale comparison of Pentagon vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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