City size comparison

compared to

Frankfurt is about 2 times bigger than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Frankfurt is approximately 248 sq km, making Frankfurt 105% larger than San Francisco.
Tip: This to-scale comparison of San Francisco vs. Frankfurt uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Frankfurt vs. San Francisco

Flip Comparison · See true size
See Frankfurt on top of San Francisco
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Cost of Living Comparison · 7 categories - 2026 data
San Francisco is 68.3% more expensive than Frankfurt
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