Amsterdam is about 1.5 times smaller than Milwaukee.

Milwaukee is approximately 249 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 66.55% the size of Milwaukee.
Tip: This to-scale comparison of Milwaukee vs. Amsterdam 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.