City size comparison

compared to

San Diego is about 8 times smaller than Shanghai.

Shanghai is approximately 6,341 sq km, while San Diego is approximately 844 sq km, making San Diego 13.31% the size of Shanghai.
Tip: This to-scale comparison of Shanghai vs. San Diego uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Diego vs. Shanghai

Flip Comparison · See true size
See San Diego on top of Shanghai
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Cost of Living Comparison · 7 categories - 2026 data
Shanghai is 62.2% cheaper than San Diego
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