Chemnitz is about 29 times smaller than Shanghai.

Shanghai is approximately 6,341 sq km, while Chemnitz is approximately 221 sq km, making Chemnitz 3.49% the size of Shanghai.
Tip: This to-scale comparison of Shanghai vs. Chemnitz 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.