Amsterdam is about 3.5 times smaller than Columbus.

Columbus is approximately 574 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 28.89% the size of Columbus.
Tip: This to-scale comparison of Columbus 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.