City size comparison

compared to

Shanghai is about 8 times bigger than San Diego.

San Diego is approximately 844 sq km, while Shanghai is approximately 6,341 sq km, making Shanghai 651% larger than San Diego.
Tip: This to-scale comparison of San Diego vs. Shanghai uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Shanghai vs. San Diego

Flip Comparison · See true size
See Shanghai on top of San Diego
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Cost of Living Comparison · 7 categories - 2026 data
San Diego is 2.6 times more expensive than Shanghai
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