Amsterdam is about 2.4 times smaller than Denver.

Denver is approximately 396 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 41.81% the size of Denver.
Tip: This to-scale comparison of Denver 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.