Amsterdam is about 1.2 times smaller than Cincinnati.

Cincinnati is approximately 202 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 82.14% the size of Cincinnati.
Tip: This to-scale comparison of Cincinnati 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.