Bronx is about 1.5 times smaller than Amsterdam.

Amsterdam is approximately 166 sq km, while Bronx is approximately 109 sq km, making Bronx 65.9% the size of Amsterdam.
Tip: This to-scale comparison of Amsterdam vs. Bronx 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.