Braunschweig is about 2.7 times smaller than Warsaw.

Warsaw is approximately 517 sq km, while Braunschweig is approximately 193 sq km, making Braunschweig 37.26% the size of Warsaw.
Tip: This to-scale comparison of Warsaw vs. Braunschweig 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.