San Jose is about 35 times smaller than Shanghai.

Shanghai is approximately 6,341 sq km, while San Jose is approximately 180 sq km, making San Jose 2.84% the size of Shanghai.
Tip: This to-scale comparison of Shanghai vs. San Jose uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.