City size comparison

compared to

San Francisco is about 7 times bigger than Cambridge.

Cambridge is approximately 17 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 630% larger than Cambridge.
Tip: This to-scale comparison of Cambridge vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Francisco vs. Cambridge

Flip Comparison · See true size
See San Francisco on top of Cambridge
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Cost of Living Comparison · 7 categories - 2026 data
Cambridge is 13.6% cheaper than San Francisco
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