Milwaukee is about 2.4 times smaller than Madrid.

Madrid is approximately 604 sq km, while Milwaukee is approximately 249 sq km, making Milwaukee 41.22% the size of Madrid.
Tip: This to-scale comparison of Madrid vs. Milwaukee 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.